Message type: E = Error
Message class:  CNV10300 - Message class for development class CNV_10300 
Message number: 103
Message text: KVEWE=&1,KOTABNR=&2,Pos.=&3,Domain=&4: Data not found in value table!
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 CNV10300103 typically indicates that during a data migration or conversion process, the system could not find the expected data in a value table. This error is often encountered in the context of SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other data conversion programs.
Cause: The error message components provide specific details: KVEWE=&1: This represents the key value that is being processed. KOTABNR=&2: This indicates the table number or identifier related to the data being processed. Pos.=&3: This refers to the position or line number in the data set where the error occurred. Domain=&4: This indicates the domain or field that is expected to have a value. The root cause of this error can be: Missing Data: The value that is being looked up does not exist in the specified value table. This could be due to incomplete data migration or incorrect data mapping. Incorrect Configuration: The configuration settings for the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV10300102 KVEWE=&1,KOTABNR=&2,Pos.=&3,domain=&4: There is no value table
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV10300101 __&1 % of &2 checked data are initial
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV10300125 KVEWE=&1,KOTABNR=&2: Conversion without org.-derivation/-delimitation
What causes this issue?  No structure field for determination or delimitation by organizational units could be found in one object keys (for domain VA...
CNV10300145 Derivation field is emtpy! &1,&2,&3
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.