How To Fix SDDL_PARSER_MSG249 - Invalid comparison in the ON condition of the composition definition

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 249

• Message text: Invalid comparison in the ON condition of the composition definition

What causes this issue?

The comparison in the composition ON condition is invalid. A key field
of the projection list must be compared with a field of the composition
target.

How to fix this error?

In a composition ON condition, a key field must be compared with a field
of the composition target.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.