Message type: E = Error
Message class:  CNV_20200_CHECK - Messages for check functions (company code merge) 
Message number: 187
Message text: Company code &1 did post taxes
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
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The SAP error message CNV_20200_CHECK187 indicates that there is an issue related to tax postings in a specific company code during a data migration or conversion process. This error typically arises when the system detects that there are tax-related postings in the specified company code, which may not be compatible with the migration process or the intended data structure.
Cause: Existing Tax Postings: The company code specified in the error message has existing tax postings that need to be addressed before proceeding with the migration. Inconsistent Data: The data in the company code may not be consistent with the requirements of the migration process, particularly concerning tax-related entries.
Configuration Issues: There may be configuration settings in the SAP system that are not aligned with the migration requirements, especially regarding tax handling.
Solution: Review Tax Postings: Check the company code for any existing tax postings. You can do this by running reports or using transaction codes like
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