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Although the pfc_u_calendar.of_reset () declares a variable called ls_coltype, this variable is never set before it is checked.
This must be a bug, but I am unfamiliar with the codebase, and am unsure exactly what the fix should be.
I checked the 12.6 code based, and this is still an issue.
I've attached the 12.5 code base with a suggested fix.