Error message KI 222 unjustified for overhead rates

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Symptom
During the overhead calculation, the system issues error message KI 222 even though the credit cost center exists for the period selected.
Other terms
KSP4, KSO9, KSI4, CPZP, CPZI, KGP2, KGP4, KGO2, KGO4, KGI2, KGI4, CJ46
CJ47, CJ08, CJ09, CJ44, CJ45, CO42, CO43, KKPZ, KKPJ, KGI2, VA44, CN22
CK11, CK11N, CO01, CO02, CJ40, KKS1, KKS2, KSA3, KSA8, VA02, [...]

Unjustified error message BK 027 for KB61

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Symptom
When you try to use transaction KB61 to repost line items by specifying an FI document, the system issues error message BK 027 even though the relevant CO document exists.
Other terms
CO_DOCUMENT_RECORD
FILL_BELNR_FROM_FI
BK027
Reason and Prerequisites
This problem is due to a program error that can occur only if you have implemented Note 1251972, and if the [...]