Consider that a report has been setup to invalidate cache based on a schedule as shown:
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When such a report is migrated into a different MicroStrategy metadata (either creating a new report object or overwriting the existing report) the cache expiration options are no longer set to invalidate based on the schedule:
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This is a known issue with MicroStrategy Object Manager 9.x and 10.x.
ACTION:
MicroStrategy will continue to investigate and post updates as soon as they are available.
WORKAROUND:
After the migration has been completed, set the cache expiration options in the target report as per the source report using MicroStrategy Developer.