This documentation supports the 19.11 version of BMC CMDB, which is available only to BMC Helix subscribers (SaaS).

To view an earlier version, select the version from the Product version menu.

BMC Atrium Core includes the BMC Configuration Management Database (BMC CMDB) and BMC Atrium Integrator. Use BMC CMDB to store and manage the configuration items (CIs) that represent your IT environment. Use BMC Atrium Integrator to transfer data between an external datastore and BMC CMDB.

Release notes and notices
updated 24 Jun
Learn what’s new or changed for BMC CMDB 19.11, including new features, urgent issues, documentation updates, and fixes or patches.


To stay informed of changes to this space, place a watch on this page.




November 22, 201919.11 enhancements

Enhancements available in this release:

  • Ability to map a predefined complex query to a class
  • Updates to the Common Data Model
October 09, 2019Documentation updateUpdated Creating or modifying classes by using Class Manager with a workaround to display BMC_ApplicationSystemServices as a weak relationship.

Related topics

Known and corrected issues

Support information



As an end user, access and navigate the CMDB user interface and Atrium Integrator.



As a developer or application programmer, develop interfaces and toolkits and customize BMC CMDB.

Managing the Common Data Model


Information and best practices for managing the Common Data Model.



As an administrator, configure the core CMDB components and archive the CMDB data, configure BMC Atrium Core Web Services, and manage the Product Catalog.



As an administrator, set up integrations with other BMC products or third-party software.



Resolve common issues or errors, review logs, or contact Support.



(On-premises only) Plan an installation or upgrade based on recommended deployment architecture, best practices, sizing, and system requirements.



(On-premises only) Install and perform initial system configuration.



(On-premises only) Upgrade based on the latest system requirements and software.

PDFs and videos


The following table lists topics that contain videos that supplement or replace the text-based documentation.

These videos are valid for BMC CMDB version 19.11.

Video titleDuration (in minutes)Description
CMDB Overview2:32

This video provides an overview of the features in the CMDB 18.08 or later.

Searching and viewing CIs and relationships using the CMDB Explorer2:20

Searching CIs using the advanced search custom query1:45

CMDB Dashboard7:55

This video takes you on a quick tour and familiarizes you with the new CMDB dashboard components.

CMDB Datasources5:39

This video provides an overview of the new Datasources component in the dashboard.

Configuring Key Performance Indicators for CMDB3:31

This video provides an overview of configuring KPIs for CMDB.

CMDB Normalization6:19

This video provides an overview of the Normalization component in the dashboard.

CMDB Reconciliation7:11

This video provides an overview of the Reconciliation component in the dashboard.

CMDB Archiving4:41

This video provides an overview of the steps to define the archiving criteria for a CI.

Creating and Editing CIs using CMDB Explorer6:20

This video provides an overview of how you can create CIs and add relationships using the CMDB Explorer.


FAQs and additional resources

This section provides answers to frequently asked questions (FAQs) about BMC CMDB components.

CMDB Impact Simulator

 Generally, how long does it take for the simulation to run?

The simulation usually gets completed in seconds, but it may take longer depending on the complexity of the graph.

 After performing an impact simulation, for how long are the resulting records stored?

By default, an impact simulation record is stored for 60 minutes. You can set the time for which the simulation is stored in memory by using the Time for SIM Cache Removal setting in CMDB core configurations.

For more information, see Impact Simulator configuration settings.

For information about running an impact simulation, see Running an impact simulation.

 Does the REST API for fetching simulation results return only the top level CIs or all the CIs in the tree between the causal CI and the top impacted CI?

The Graphwalk API that is used to retrieve the CIs and its relationships always returns the complete graph, which means that all the CIs in the tree between the causal CI and the top impacted CI are returned.

 For simulating the impact using REST APIs, can I supply the Recon ID instead of the Instance ID in the request JSON for triggering the simulation?

The Recon ID is the same for a CI found by multiple discovery sources and populated in multiple datasets. Therefore, a search based solely on the Recon ID may return multiple instances.  Whereas, the Instance ID uniquely identifies the CI across all datasets in BMC CMDB. 

You can fetch the Instance ID by calling the getInstances REST API.
Its URL is GET /cmdb/v1.0/instances/{datasetId}/{namespace}/{className}. 

If the Recon ID is the qualifier, include the Recon ID along with the dataset in the qualification to return the Instance ID.

For more information, see Endpoints in the REST API.

CMDB Search

 What are the search options available for CIs?

The options available are Quick Search and Advanced Search. Quick Search is the basic search, which helps you search for CIs quickly, based on the parameters you specify. With Advanced Search, can use template queries or build your own custom query.

 Can I search for CIs that are Marked As Deleted?

Yes, you can search for CIs that are Marked As Deleted, by performing the following steps:

  1. On the Search Widget, select Quick Search.
  2. Select the dataset and class.
  3. In the Attribute field, select MarkAsDelete.
  4. In the AttributeValue field, enter 1, to show all CIs that have the MarkAsDelete attribute set as True.
 Is wildcard search supported?

Yes, Wildcard % is supported in search.

To search for a parameter type the string. By default, the wildcard character % is appended automatically to the end of the search string, while is the search is being run. The search returns all values starting with the search string you entered. For example, if you enter the string as Comp, the search returns values like Computer, Comp12, ComputerSystem, and so on.

However, if you want to search for CIs containing a particular string, you can place % anywhere in the search string to use as a wildcard.  For example, %system returns results like ComputerSystem, Computer_System,  AdminSystem, and so on.

CMDB Explorer

 When I click the link of a CI to view its details, I get an 'Instance not Found' error. Why is this error shown?

This error is displayed if you click a CI's link to view its details, but the CI has already been deleted. However, you can still view the details of a deleted CI. An example of the Integrity page from which the link to the CI details can be accessed is shown in the following figure.

 CMDB Explorer looks cluttered and I would like to view only certain CIs. Is there an option to achieve this in CMDB Explorer?

When large datasets are displayed on CMDB Explorer, the canvas may look cluttered with too many CIs. You can group all the CIs that you do not want to view into a custom group. Then you can view only those CIs of your interest. A custom group can contain CIs of different classes.

Perform the following steps to create a custom group.

  1. Click Drag Mode to switch to Select Mode.
  2. Hold your left mouse button on the canvas and draw your selection to include CIs that you want to group.
  3. Click Group Selected CIs. The Custom group is created.
  4. Click Drag Mode again.
However, there are restrictions for including a CI as part of a custom group, which are listed as follows:

a. You cannot add an already existing group of CIs to a custom group.
b. CIs that are children of another group cannot be added to a custom group.

 Can I exclude specific types of CIs or relationships from being displayed in CMDB Explorer?

Yes, you can use Filters to include or exclude CIs from being displayed in CMDB Explorer.

In BMC CMDB 9.1 and earlier versions, there were separate options to show or hide the selected classes.

In the new CMDB UI, filtering is simplified and you can achieve the same results by checking only those classes and relationships that you want to view on the Explorer canvas. The Filtering options are as shown in the following figure.

When you create a filter, you can also determine whether that filter can be used by others or only by you.

If Is Global is ON, the filter is saved as a shared filter and is available to everyone. If Is Global is OFF , the filter is saved as a Personal filter and it is available only to you.

 Can I collapse an expanded node?

No, you cannot collapse an expanded node. However, you can either group similar CIs or group CIs of your interest by creating a custom group. Use Drag Mode on CMDB Explorer to create a custom group.

  1. Click Drag Mode to switch to Select Mode.
  2. Hold your left mouse button on the canvas and draw your selection to include CIs that you want to group.
  3. Click Group Selected CIs. The Custom group is created.
  4. Click Drag Mode again.

BMC CMDB Reconciliation Engine

 What is Reconciliation Engine?

Reconciliation Engine is a component installed with the BMC CMDB. The main function of the Reconciliation Engine is the creation of a production dataset that contains accurate data from all available sources. Data in the production dataset is then used by consuming applications.

For more information, see the following resources:

 What should I do to prevent errors that might occur when running Reconciliation Engine jobs?

Before you run a Reconciliation Engine (RE) job, perform the following:

  • Perform CDM metadata diagnostics - Run the CDMChecker utility to:
  • Perform data diagnostics
  • Perform Reconciliation Engine-specific data diagnostics
  • Perform manual checks for RE jobs
    • Make sure that all the classes and attributes used in standard or custom rules of all the RE jobs exist in your CDM data model. If a certain job is imported in your CDM, the job might fail.
    • Make sure that the data sets (source, target and precedence data set) referred in all the RE jobs also exist in the BMC_Dataset class.
  • Check whether indexes are set
    • During upgrade, for optimal RE performance, ensure that the out-of-the-box indexes set up on BMC.CORE:BMC_BaseElement and BMC.Core:BMC_BaseRelationship forms.Discrepancies, if any, are logged in the Atrium Installer log file. The following image displays an example message:

 What are the best practices that need to be followed before starting reconciliation activity?

Watch the video on Reconciliation Engine best practices:

Configure recommended settings

Ensure that the System-level settings and Job-level settings are configured as per the recommendations. See the following images for recommended settings:

System-level settings

Job-level settings

For more information, see  Configuring Reconciliation Engine system parameters .

 Under what conditions should the OOTB configuration settings be changed?

You should consider changing the default configuration settings in the following scenarios:

  • If you are dealing with large volume of data, increase the value of the Definition Check Interval field.
  • If you need specific log details, ensure that you change the log level to Debug. (Change the default log value only when you need and reset it back to default log level when you are done). Additionally, set the Maximum Job Log File Size value to 50000 KB.
  • If the RE Job is not responding for a long period, set Job Idle Time value to the desired time other than the default value (0).
 What are standard rules and when should standard rules be used?

Standard identification and precedence rules simplify the process of creating reconciliation jobs. Standard rules use defaults for Identify and Merge activities and automate the creation of reconciliation jobs.

The standard rules work with all classes in the Common Data Model (CDM) and BMC extensions. They identify each class using attributes that typically have unique values, and they merge based on precedence set for BMC datasets. Standard reconciliation jobs always use these standard rules, but you can also use standard rules when you create your own reconciliation job.

You must use standard rules:

  • When configuration items are published into the CMDB or when the data is pulled from the CMDB.
  • To uniquely identify attributes of the discovered configuration items.
 What are custom rules and when should custom rules be used?

A set of rules that are created as per your specific business requirements and are not part of the standard rules are termed as custom rules. You can use custom rules for CI classes.

The following is an example scenario in which you might want to create custom rules:

If you have extended the Common Data Model by adding a new attribute, which is specific to your requirement and which might not be populated by any discovery tool. You might want to define custom rules to identify your assets based on this attribute.

For more information about using custom rules, see Creating an identification ruleset for reconciliation.

 What are identification rules and precedence rules and how do I define them?

Standard identification and precedence rules simplify the process of creating reconciliation jobs. A reconciliation job is provided with a standard rule sets of identification and precedence rules.

These standard rules work with all classes in the Common Data Model (CDM) and BMC extensions. They identify each class using attributes that typically have unique values, and they merge based on precedences set for BMC datasets. Standard reconciliation jobs always use these standard rules, but you can also use them when you create a custom reconciliation job.

For more information, see Standard identification and precedence rules for reconciliation jobs.

 How do I define precedence order?

Watch the following video:

For more information, see Configuring standard precedence rules for reconciliation .

 What should I not do with my CMDB data?
  • Do not set a Reconciliation Engine ID manually in any dataset.
  • Do not manually delete data, which is marked as soft delete.
  • Do not delete datasets manually. You must also need to clean up dataset references from Reconciliation Engine, Normalization Engine etc.
 How should I use qualifications in Reconciliation Engine activity?

For most reconciliation activities, you can specify a qualification set for the purpose of restricting the instances that participate in an activity. Qualification sets, which are reusable between activities, are qualification rules that each select certain attribute values. Any instance that matches at least one qualification in a set can participate in an activity that specifies the qualification set.

For example, you might create a qualification set that selects instances that were discovered within the last 24 hours and have the domain "Frankfurt" if your company just opened a Frankfurt office and you are reconciling its discovered CIs for the first time.

 What is a data analyzer tool in CMDB?

The CMDB Data Analyzer is a collection of tools that enable you to perform data analysis and also identify  data inconsistencies  in any CMDB dataset.

For more information, see  Using CMDB Data Analyzer to Investigate CMDB Data Issues .

 What does reconcile only normalized CIs mean?

As a best practice, BMC recommends that you must reconcile only those CIs that have been normalized or those that do not require normalization. To reconcile the appropriate CIs, enable the Process Normalized CIs Only option in the Job Editor.

 How do I reconcile manually created CIs?

To reconcile manually created CIs, perform the following steps:

  1. Create a custom job.
  2. Define the job for the classes in which you populate the data.
  3. Identify the CIs. 
    1. Ensure that you adhere to the identification rules for the discovered jobs so that your CI matches with the discovered CIs.
    2. Ensure that you populate at least those columns/attributes correctly that are defined in the identification rules (This helps in correct identification of the CI with the existing CI)
  4. Set a lower precedence value for the manual dataset, but set a highest precedence to the manually edited columns/attributes of the dataset.
 What are the possible causes of a partial merge? What do I do if CIs merge partially?

CIs are partially merged when the merge process fails due to data issues.

See the following flowchart that explains the checks to be performed if the CIs are partially merged:

 How do I find duplicate CIs in the same dataset?

 Run the CMDB Data Analyzer utility to find duplicate CIs. See  Using CMDB Data Analyzer to Investigate CMDB Data Issues .

 How do I find same CI in multiple datasets?

Run Reconciliation Engine's (RE) Identification activity across multiple datasets. For example, open the BMC.CORE:BaseElement form and enter the RE ID value and search. If a CI having the same RE ID is found in multiple datasets, it means that the same CI exists in those datasets.

 How do I find orphan CIs?

Run the CMDB Data Analyzer utility to find orphan CIs. See  Using CMDB Data Analyzer to Investigate CMDB Data Issues .

 What are the most common failures in RE and why?

The following table lists the common RE issues and provides access to relevant resources and workaround to these issues.



Duplicate CIs in discovery/source datasets. This error message is logged in the RE Job log.

See Reconciliation Engine multiple CI match issues.

ARERR[120092] The dataset ID and Reconciliation Identity combination is not unique.

  • Check the instance or data of the source dataset
  • Check whether the instance is duplicate
  • Check if your identification rules are correct (by using multiple attributes)

Multiple instances found in target dataset.

This error message is logged in the RE Job log.

  • Check if your identification rules are correct
  • Check the instances or duplicate data in the target dataset

ARERR[101049] Dataset <> does not exist.

Aborting... Activity ended with error.

This error occurs when you delete or rename any dataset and it does not get updated on all required places such as precedence sets etc.

Perform the following:

  1. Check all existing precedence sets and do a cleanup of dataset in question.
  2. Create a dataset with the same name which RE is looking for
Cannot find the endpoint of relationship.

This error occurs if you manually modify a CI and fail to modify its relationship, causing data integrity issues.

For more information, see Troubleshooting reconciliation based on error messages.
 How to migrate RE jobs from one computer to another?

To migrate the RE jobs, you must:

  1. Export the RE job data using the Reconciliation Console. See Exporting reconciliation definitions.
  2. Import the ARX data using BMC Remedy Data Import tool. See  Enabling the Data Import utility in the BMC Remedy AR System online documentation.
 What to do if RE process terminates or is unresponsive?

The Reconciliation Engine process terminates because:

  • The AR System server or database is busy and is unable to process the requests coming from RE.
  • The AR System server is either not responding or not reachable.

In the above scenarios, RE awaits for a response from the AR System server and then terminates itself.

For more information, see the Knowledge Article.

 The scheduled RE jobs are not running or are getting delayed. What do I do?

Perform the following:

  • Check whether the job schedule is deleted or modified.
  • Check whether the Application Pending form has an entry for that job.
    • If there is no entry for that job, enable the AR API, SQL and Filter logs.
    • If the entry exists, check the AR Dispatcher log.
  • Check whether RE is registered with the AR Dispatcher.
  • Check the number of entries in the Application Pending form.
    • If there are many entries in the form and if you do not need them, delete those entries from the form.
  • Check whether the RE job entry is in the Queued state in the RE job run. If yes, delete the entry from the Queued state.
  • If you are using RE in a server group environment, ensure that the Reconciliation-Engine-Suspended flag is set to False (F). Note: You cannot set this value manually.
 Changes to RE job, rules, or qualification sets are not reflecting in the Atrium Console. What do I do?

Perform the following:

  1. Enable server-side logs.
    1. Edit the file located in the <AR_Installation_Home>\midtier\WEB-INF\classes folder. Add the following lines:

      log4j.rootLogger=DEBUG, atrium
        log4j.appender.atrium.File=C:/Program Files/BMC Software/ARSystem/midtier/logs/atrium-ui.log
        log4j.appender.atrium.layout.ConversionPattern==%d[%t] %-5p %C{1} - %m%n

      and DEBUG DEBUG

    2. (BMC Atrium Core 7.6.04 or earlier): Edit the <AR_HOME>\ARSystem\midtier\WEB-INF\flex\services-config.xml file.

      (BMC Atrium Core 8.0 or later): Edit the <AR_HOME>\ARSystem\midtier\WEB-INF\AtriumWidget\flex\services-config.xml file.

      In the services-config.xml file, modify the logging level from Warn to Debug. 

      For example, change the following line:
      <target class="flex.messaging.log.ConsoleTarget" level="WARN">
      <target class="flex.messaging.log.ConsoleTarget" level=“DEBUG">
  2. Enable client-side logs.
    For information about enabling client-side logs, see BMC Atrium Core Console client-side logging.
 How to create a RE job for multiple source datasets?

 See this  knowledge article .

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