SAP Note 17760 - FI/CO-PA: Special periods posted into the wrong period

Symptom:

Error in the FI/CO-PA interface. Postings in a special preiod in FI are posted to the 12th period in CO-PA.

Cause and prerequisites

Error in program RKEVRK2O (Release 2.1*,2.2*) or RKEVRK2R (Release 3.0*)
This always calculates the period from the posting date and updates it in the CO-PA line items.

Solution
Eliminated by correction P22K004098/P22K012593 for 2.2H or P30K045000
for 3.0C.
In the meantime, you can eliminate the error by changing program below (Changes are indicated by <-- ):

Additional key words

FI - CO-PA - Interface, Special period