Operational block due to error message C+ 048

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Symptom
When you post a transaction that changes the valuated stock of a material, the system issues error message C+ 048. Processing terminates and you cannot post the transaction.
Other terms
C+ 048, MMINKON, CKMHELP, inconsistency, inconsistency block, ACTUPD.
Reason and Prerequisites
This problem is caused by an inconsistency between the material master (table MBEW, MBEWH) and the [...]