How To Fix CDS_UNIT_MESSAGE100 - Insertion failed. Source type '&1' does not match target type '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: CDS_UNIT_MESSAGE - Message Class

• Message number: 100

• Message text: Insertion failed. Source type '&1' does not match target type '&2'

Self-Explanatory Message

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CDS_UNIT_MESSAGE100 - Insertion failed. Source type '&1' does not match target type '&2' ?

  The SAP error message CDS_UNIT_MESSAGE100 indicates that there is a type mismatch between the source and target fields during an insertion operation in a Core Data Services (CDS) view or a related database operation. This typically occurs when you are trying to insert data into a database table or a CDS view, and the data types of the source and target fields do not align.
  Cause:
  
  Data Type Mismatch: The most common cause is that the data type of the source field (the data you are trying to insert) does not match the data type of the target field (the field in the database or CDS view).
  Incompatible Structures: If you are using structures or complex types, the internal representation may not match.
  Field Length Issues: Sometimes, even if the data types match, the length of the data being inserted may exceed the length defined for the target field.
  Nullability: If the source field allows null values but the target field does not, this can also lead to issues.
  
  Solution:
  
  Check Data Types: Verify the data types of both the source and target fields. Ensure they are compatible. For example, if the target field is of type CHAR(10), the source should also be a character type with a maximum length of 10.
  Adjust Field Lengths: If the lengths of the fields are mismatched, either truncate the source data or increase the length of the target field if possible.
  Data Transformation: If necessary, transform the data before insertion to ensure compatibility. This may involve converting data types or formatting the data correctly.
  Review CDS View Definitions: If you are working with a CDS view, check the definitions of the fields in the view to ensure they match the expected types in the target database table.
  Debugging: Use debugging tools to trace the data flow and identify where the mismatch occurs. This can help pinpoint the exact source of the error.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review the SAP documentation for Core Data Services and data types to understand the expected formats and types.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the cause of the CDS_UNIT_MESSAGE100 error in your SAP environment.