Message type: E = Error
Message class:  CNV10994 - Message class for CNV_10994 
Message number: 148
Message text: &1,&2,&3: Prefix could not be determined!
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 CNV10994148 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 determine a prefix for a specific object or entity, which is necessary for the migration process to proceed.
Cause: Missing Configuration: The prefix for the object may not be configured correctly in the system. Data Inconsistencies: There may be inconsistencies or missing entries in the source data that prevent the system from determining the appropriate prefix. Custom Objects: If you are migrating custom objects or fields, the system may not have the necessary information to derive the prefix. Incorrect Mapping: The mapping of source to target fields may not be set up correctly, leading to the inability to determine the prefix.
Solution: Check Configuration: Ensure that the necessary configurations for the object prefixes are set up correctly in the system. This may
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV10994147 check under type group GSET!
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV10994146 see suggested structure for related TABKEY (adapt offsets!)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV10994149 No change document objects are known for the relevant domains!
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV10994150 There are warnings! => See log after leaving maintenance
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.