Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 255
Message text: &1 is blocked for posting in company code &3, whereas account &2 is not
Account &V1& is blocked for posting in company code &V3&, whereas
account &V2& is <ZH>not</> blocked for posting in company code &V3&.
This property is determined by the indicator <zk>blocked for
posting? (XSPEB)</> .
This may lead to problems when the two accounts are merged into target
account &V3&.
Warning.
From a technical perspective, the conversion can be executed anyway.
Check if this merge of accounts is really wanted. If not, you adjust the
mapping accordingly.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_20100255 indicates that a specific account is blocked for posting in a particular company code. This error typically arises during data migration or when trying to post transactions in the SAP system. Here’s a breakdown of the cause, potential solutions, and related information:
Cause: Account Blocking: The account specified in the error message is blocked for posting in the specified company code. This can happen due to various reasons, such as: The account is marked as "blocked" in the master data. The account is not allowed for postings in the specified company code due to configuration settings. The account might be set to a status that prevents postings (e.g., closed for the fiscal year). Company Code Configuration: The company code may have specific settings that restrict postings to certain accounts or types of transactions. Data Migration Issues: If this error occurs during a data migration process, it may indicate that the migration settings
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