Message type: E = Error
Message class:  CNV20551 - message for package 20551 (company code delete) 
Message number: 404
Message text: Offset=&1: Suggestion: domain &2 <> CNV_20551_TSTRUC-DOMNAME = &3
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.
Unfortunately, there isn't any extra information in this error notice.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message CNV20551404 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates a mismatch between the expected domain name and the actual domain name being processed.
Cause: The error message suggests that there is a discrepancy between the domain name expected by the system and the domain name that is being processed. Specifically, it indicates that the domain name in the data being migrated (denoted as &2) does not match the domain name defined in the target structure (denoted as &3). This can happen due to: Data Inconsistencies: The source data may contain values that do not conform to the expected domain definitions in the target system.
Configuration Issues: The target system may not have the correct domain definitions set up, or there may be a mismatch in the configuration. Custom Developments: If there are custom fields or
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV20551403 Offset=&1: Suggestion data el. &2 <> CNV_20551_TSTRUC-ROLLNAME = &3
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20551402 There is a data record with the same key in CNV_20551_TSTRUC
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20551405 Offset=&1: Suggestion: Dtel. &2 (domain &3) - missing in CNV_20551_TSTRUC
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20551406 &1,PARAM=&2, sample value &3: No structure suggestion can be made
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.