Establishing multiple sessions
An EXEC can establish sessions with multiple VTAM applications concurrently; however, a different OSPI control variable prefix must be used for each session.
If different prefixes are not used for each session, the information for one session overlays the information for another session.
The default prefix for the OSPI control variables is OSI. The PREFIX keyword on the IMFEXEC LOGON command allows any three character prefix to be used for the variables.
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