Periodically started Workflows, may generate a forced trace U0007056 Forecast record not available error

Document ID : KB000087672
Last Modified Date : 14/04/2018
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Issue:
Error Message :
U0003620 Routine 'UCFCST_R' forces trace because of error.
U0007056 Forecast record IDNR '028343665' is not available.

A forced trace can be written by the Automation Engine during the forecast of periodic Tasks.  Errors similar to those below are shown in the WP log file:
 
20160525/041545.986 - U0003620 Routine 'UCFCST_R' forces trace because of error.
20160525/041545.986 - U0003450 The TRACE file was opened with the switches '0000000000000001'.
...
20160525/041545.989 - U0007056 Forecast record IDNR '028343665' is not available.
20160525/041546.092 - U0003449 Output to the TRACE file is finished.
20160525/041546.101 - U0011801 Error in Server routine 'UCFCST_R', Server: 'UC4#WP009' UC4 system: 'UC4'.
20160525/041546.102 - U0007056 Forecast record IDNR '028343665' is not available.

This only seems to affect Workflows (WF) that are periodically started. There have been no negative effects observed on the system as a result.
Cause:
Cause type:
Defect
Root Cause: An error has been fixed where a forced trace has been written in the automation engine during forecast of periodic tasks. Error message is: "U0007056 Forecast record IDNR '0012345678' is not available"
Resolution:
This field was added on 30/03/2017. This article has not been updated yet. Refer to the "Description" or "Workaround" sections for solution information.

Fix Status: Released

Fix Version(s):
Automation Engine 12.0 - Available
Automation Engine 11.2.3 - Available
Automation Engine 11.1.4 - Available
Automation Engine 10.0 - will not be fixed
Additional Information:
Workaround :
Instead of starting the WF periodically, the WF can be started by other means such as by a timed event.