How To Fix MC737 - Invalid type in join &-& = &-&

MC737 - Overview

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 737

• Message text: Invalid type in join &-& = &-&

What causes this issue?

The field type does not permit you to define a join condition.
Types for which a join condition cannot be defined are LRAW and LCHR.

System Response

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

How to fix this error?

The view cannot be defined in this way.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC737 - Invalid type in join &-& = &-& ?

  The SAP error message MC737 "Invalid type in join &-& = &-&" typically occurs in the context of SAP's reporting and data extraction processes, particularly when working with queries or reports that involve joins between different data tables. This error indicates that there is a mismatch in the data types of the fields being joined.
  
  Cause:
  
  Data Type Mismatch: The most common cause of this error is that the fields being joined have incompatible data types. For example, trying to join a character field with a numeric field.
  Incorrect Field Selection: Sometimes, the fields selected for the join may not be appropriate for the join condition, leading to this error.
  Database Schema Changes: If there have been changes in the underlying database schema (like changes in data types or field definitions), it can lead to this error.
  Custom Code or Queries: If you are using custom ABAP code or queries, there might be an issue