Single scheduled report us producing a blank report

Document ID : KB000102604
Last Modified Date : 25/06/2018
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We have one Schedule report for a client that when scheduled creates a blank report.
When we run the same report manually it works fine.
Also all other scheduled reports work fine.
What could be wrong?
UIM 9.0 and earlier
UMP 9.0 and earlier
The client had the Scheduled report setup twice.
one with the correct origin and one without.
Once the duplicate report was removed and the proper origin setup
the scheduled report started working as expected.