Message type: E = Error
Message class:  CNV20345 - Message class 20345 
Message number: 003
Message text: &1 records would be created
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 CNV20345003 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there is an issue with the data being processed, which prevents the system from creating the specified number of records.
Cause: The error message CNV20345003 can be caused by several factors, including: Data Validation Issues: The data being migrated may not meet the required validation rules or constraints defined in the target system. This could include missing mandatory fields, incorrect data formats, or values that do not conform to the expected range. Mapping Errors: There may be issues with the mapping of source data to target fields. If the mapping is incorrect or incomplete, it can lead to failures in record creation.
Configuration Issues: The configuration settings in the migration tool or the target system may not be set up correctly, leading to errors during the migration
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV20345002 &1 records were inserted in CNVRENAME
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20345001 &1 records were deleted from CNVRENAME
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20345004 No mapping of J_OBJNR required because of table ONRAO!
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20345005 &1 records for J_OBJNR entered in mapping table CNVRENAME due to ONRAO
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.