Backing out runtime definitions imported by the IMPORT command with a cold start of IMS

If you created or updated runtime resources definitions by importing definitions from a resource definition data set (RDDS) or the IMSRSC repository by using the IMPORT DEFN command, you can back out the changes to your online system with a cold start of IMS.

Prerequisite: This option requires that all the resource and descriptor definitions were exported to a non-system RDDS before the original IMPORT DEFN command was issued.
For resources imported from an RDDS, perform the following steps:

Procedure

  1. Cold start IMS with no MODBLKS resources defined (by specifying AUTOIMPORT=N in the Dynamic Resources section of the DFSDFxxx member of the IMS PROCLIB data set).
  2. Issue the IMPORT DEFN SOURCE(RDDS) command to import all the definitions from the non-system RDDS that was created for backout recovery before the original IMPORT DEFN command was issued.

After the backout is complete, if you are running with system RDDSs defined, issue the EXPORT DEFN TARGET(RDDS) command to export the current definitions to a system RDDS. Or, if you are running with the IMSRSC repository enabled, issue the EXPORT DEFN TARGET(REPO) command or use the automatic export function to export the current definitions to the repository.