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Customizing File Manager IMS™ Component
Customizing the operating environment for FM/IMS
Customizing IMS™ to support the use of dynamic PSBs
If you plan to use dynamic PSBs to access databases, you might have to declare the dynamic PSBs and provide a DOPT ACBLIB data set.
Providing a DOPT ACBLIB data set
If you plan to use the IMS Data Definition utility to generate dynamic PSBs, or ACBs are managed by your installation (ACBMGMT=ACBLIB) and you do not plan to use dynamic PSBs to access databases in BMP mode, a DOPT ACBLIB data set is not required.

Customizing File Manager IMS™ Component
- Preparing to customize FM/IMS
- Customizing the operating environment for FM/IMS
  - Modifying the ISPF environment
  - Customizing IMS™ to support the use of dynamic PSBs
    If you plan to use dynamic PSBs to access databases, you might have to declare the dynamic PSBs and provide a DOPT ACBLIB data set.
    - Declaring the dynamic PSBs
      If you do not plan to use dynamic PSBs to access databases in BMP mode, or dynamic resource definition for MODBLKS resources is enabled and you plan to use the IMS Data Definition utility to generate dynamic PSBs, declaring the dynamic PSBs is not required.
    - Providing a DOPT ACBLIB data set
      If you plan to use the IMS Data Definition utility to generate dynamic PSBs, or ACBs are managed by your installation (ACBMGMT=ACBLIB) and you do not plan to use dynamic PSBs to access databases in BMP mode, a DOPT ACBLIB data set is not required.
- Customizing FM/IMS
- Customizing the FM/IMS security environment
- Customizing the File Manager audit facility for IMS™ component
- Customizing FM/IMS for national languages
  You can customize FM/IMS for national languages other than English.
- Verifying the customization of FM/IMS

Providing a DOPT ACBLIB data set

If you plan to use the IMS Data Definition utility to generate dynamic PSBs, or ACBs are managed by your installation (ACBMGMT=ACBLIB) and you do not plan to use dynamic PSBs to access databases in BMP mode, a DOPT ACBLIB data set is not required.

Otherwise, provide an ACBLIB data set into which the ACB Maintenance utility can generate DOPT PSBs. Use the DYNACB parameter on the FMN1POPI macro statement to specify the name of this data set.

When the ACBs are managed by your installation (ACBMGMT=ACBLIB), concatenate the specified data set with the primary ACBLIB data set in the IMS™ execution JCL (that is, the JCL that starts the IMS™ control region). The DOPT ACBLIB data set must be concatenated to both the IMSACBA and IMSACBB DDs in the IMS™ execution JCL.

When IMS™ management of ACBs is enabled (ACBMGMT=CATALOG), you do not have to concatenate the specified data set with the primary ACBLIB data set. Instead, the specified data set is used as input for the IMS Catalog Populate utility (DFS3PU00), which adds the DOPT PSBs to the IMS catalog.