Message type: E = Error
Message class:  CNV20551 - message for package 20551 (company code delete) 
Message number: 454
Message text: CONVFUNC is empty
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 CNV20551454 with the description "CONVFUNC is empty" typically occurs during data conversion processes, particularly when using the SAP Data Migration tools or during the execution of conversion programs. This error indicates that a required conversion function (CONVFUNC) is not defined or is missing in the context where it is being called.
Cause: Missing Conversion Function: The conversion function that is supposed to handle the data transformation is not defined in the system.
Configuration Issues: There may be issues in the configuration of the data migration or conversion settings. Incorrect Mapping: The mapping of fields in the data conversion process may not be correctly set up, leading to the absence of a required conversion function. Custom Development: If there are custom conversion routines, they may not be implemented or activated properly.
Solution: Check Configuration: Review the configuration settings for the data migration or conversion process. Ensure that all necessary conversion functions are defined and
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV20551453 Field of domain &1, data element &2 not found in key of table &3
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20551452 Field of domain &1 not found in key of table &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20551455 INTR_FLD=&: Overflow for internal counter assignment INDX (8 digits)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20551456 Error; entry in CNV_20551_TSTRU2 has length=0 (&)
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.