Message type: E = Error
Message class:  CNV_OR_PE - Messages for remote components 
Message number: 004
Message text: DDIC type &1 is not a table type (system ID=&2)
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_OR_PE004 indicates that there is an issue with a Data Dictionary (DDIC) type that is expected to be a table type but is not recognized as such in the system. This error typically arises during data migration or conversion processes, particularly when using tools like SAP's Landscape Transformation (SLT) or other data migration tools.
Cause: Incorrect DDIC Type: The specified DDIC type (&1) is not defined as a table type in the SAP system. It could be a structure or another type that does not support the operations being attempted.
Configuration Issues: There may be configuration issues in the migration or conversion settings that reference the wrong type. Transport Issues: If the DDIC type was recently transported from another system, it may not have been transported correctly or completely. Version Mismatch: There could be a version mismatch between the source and target systems, leading to discrepancies in the DDIC definitions.
Solution: Check DDIC
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_OR_PE003 DDIC type &1 is not found (system ID=&2)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_OR_PE002 Method &1 is not found in class or interface &2 (system ID=&3)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_OR_PE005 Line type of a DDIC table type &1 is unknown (system ID=&2)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_OR_PE006 Screen &1 is not found in program &2 (system ID=&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.