About Memo-Delete and Undelete
The Housekeeping function in global administration physically deletes change packages according to these criteria:
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A package has a status of BAS (baselined), INS (installed at all sites), or TCC (temporary change cycle completed), and a minimum number of package aging days (specified in application administration) have passed since the package was installed.
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A package has been memo deleted using the Delete Package function, and has a status of DEL.
Because a memo deleted package is not physically deleted until housekeeping jobs are run, you can use the Undelete Package function to change the DEL status back to DEV.
When housekeeping jobs physically delete a memo deleted change package, package records in the package master file are deleted, and package staging libraries are scratched.