Message type: E = Error
Message class:  CNV_2010C - Message class for CoA on Cloud 
Message number: 138
Message text: Customizing TR for SKAD updates : &1
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 CNV_2010C138 typically relates to issues with customizing transport requests (TR) for SKAD (SAP Knowledge Assessment and Development) updates. This error can occur during the transport of customizing settings, particularly when there are inconsistencies or issues with the transport request.
Cause: Missing or Incomplete Customizing Data: The transport request may not contain all the necessary customizing data required for the SKAD updates. Transport Request Issues: The transport request might be locked, incomplete, or not properly released. Version Conflicts: There may be version conflicts between the source and target systems, leading to issues in the transport process. Authorization Issues: The user may not have the necessary authorizations to perform the transport or access the customizing data.
Solution: Check Transport Request: Verify that the transport request is complete and contains all necessary objects. You can do this by checking the transport logs and ensuring that all required customizing data is included. Release Transport Request: If the transport
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_2010C137 No transport request identfied by METHOD check_record_key_allowed
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_2010C136 Mapping Guid is empty. Unable to process.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_2010C139 GL account description changes for &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_2010C140 Synch between config. system and S/4HANA failed. Contact CA-DT-CNV-S4C.
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.