Message type: E = Error
Message class:  CNV_20200_CHECK - Messages for check functions (company code merge) 
Message number: 363
Message text: Company code: &1 - Company code for number assignment: &2
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.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
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The SAP error message CNV_20200_CHECK363 typically relates to issues with number assignment for company codes during data migration or conversion processes, particularly in the context of SAP S/4HANA migrations or data transfer projects. The message indicates that there is a mismatch or an issue with the company code settings for number assignment.
Cause: Mismatch in Company Codes: The error suggests that the company code specified in the message (&1) does not match the expected company code for number assignment (&2). This could happen if the configuration for number ranges is not set up correctly. Missing Number Ranges: The company code may not have a defined number range for the specific document type or transaction being processed. Incorrect Configuration: There may be an issue with the configuration settings in the SAP system related to number assignment for the company codes involved.
Solution: Check Company Code Configuration: Go to the transaction code OBAS (for number range management) or OBA7
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