Message type: E = Error
Message class:  CNV20551 - message for package 20551 (company code delete) 
Message number: 804
Message text: Table assigned with empty deletion criterion &1 was excluded by &2 on &3
This table was assigned with an empty deletion criterion and it was
excluded by user manually using the transaction CNV_20551_EXCLUDE.
Selection was not run for this table during the convesion.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV20551804 indicates that a table has been assigned an empty deletion criterion, which means that the system is trying to process a table that does not have any criteria defined for deletion. This can occur during data migration or conversion processes, particularly when using SAP's Data Migration tools or during system conversions.
Cause: Empty Deletion Criterion: The table in question has been configured without any criteria for deletion, which means that the system does not know which records to delete.
Configuration Issues: There may be a misconfiguration in the data migration settings or the mapping of the tables. Data Integrity: The data in the table may not meet the expected criteria for deletion, leading to the exclusion of the table from processing.
Solution: Define Deletion Criteria: Review the configuration for the table and ensure that appropriate deletion criteria are defined. This may involve specifying conditions under which records should be deleted. Check Migration
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV20551803 Security check failed for program &1.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20551802 &1 is not a valid table name.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20551805 No determination programs found terminated in system
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20551806 Select at least one entry
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.