Message type: E = Error
Message class:  CNV_10020 - Message class for package 10020 
Message number: 800
Message text: Technical information
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_10020800 typically relates to issues encountered during data migration or conversion processes, particularly when using SAP's data migration tools. This error can arise in various scenarios, such as during the execution of a migration project or when using specific conversion programs.
Cause: The error CNV_10020800 can be caused by several factors, including but not limited to: Data Inconsistencies: There may be inconsistencies or invalid data in the source system that prevent successful migration.
Configuration Issues: Incorrect configuration settings in the migration tool or the target system can lead to this error. Missing Dependencies: Required objects, such as tables or fields, may be missing in the target system. Authorization Issues: The user executing the migration may not have the necessary authorizations to perform the operation. Technical Limitations: There may be technical limitations or bugs in the migration tool itself.
Solution: To resolve the CNV_10020800 error, consider the following steps: Check Logs: Review the detailed logs generated during
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_10020794 Message number &1 does not exist in message class &2; check your input
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_10020793 Message class &1 does not exist; check your input
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_10020801 Prefix &1 is not supported; check your input
What causes this issue?  The special character '~' in a table field is used in order to distinguish between tables and other type of objects...
CNV_10020802 Functionality not available for object type &2
What causes this issue?  You tried to use a functionality that is not implemented within package &V1&.System Response  For all objects of type...
Click on this link to search all SAP messages.