Message type: E = Error
Message class:  CNV20551 - message for package 20551 (company code delete) 
Message number: 326
Message text: Error while creating routine &1; routine=&2 not found
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 CNV20551326 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 that the system is unable to find a specific routine that is required for the data processing task.
Cause: Missing Routine: The specified routine (in this case, &2) is not available in the system. This could be due to it not being created, being deleted, or not being activated. Incorrect Configuration: The configuration settings may point to a routine that does not exist or is incorrectly defined. Transport Issues: If the routine was transported from another system, there may have been issues during the transport process that caused it not to be available in the target system. Authorization Issues: The user executing the migration may not have the necessary authorizations to access the routine.
Solution: Check Routine Existence: Verify if the routine &2 exists in the system. You
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV20551325 Object type &1: Check routine &2 is missing
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20551324 Error while creating routine &1; object type=&2 not found
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20551327 Object type &1: Sequence conflict? with &2 &3 (&4)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20551328 INTR_FLD=&1, PARAM=&2: contains domain &3 and is ignored
What causes this issue?  Non-transparent field &V1& (PARAM=&V2&) contains domain/object &V3&, which can relate to itself. To a...
Click on this link to search all SAP messages.