How To Fix MC759 - Join for field &-& uses an SY field

MC759 - Overview

• Message type: E = Error

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

• Message number: 759

• Message text: Join for field &-& uses an SY field

What causes this issue?

A join condition on a field of the system table SY (or SYST) was
defined. This is not permitted for database views because the system
table is not known to the database.

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?

Error message extract from SAP system. Copyright SAP SE.

MC759 - Details

• The SAP error message MC759, which states "Join for field &-& uses an SY field," typically occurs in the context of SAP's reporting and data extraction processes, particularly when working with InfoObjects in the SAP BW (Business Warehouse) environment. This error indicates that there is an issue with the way fields are being joined in a query or report, specifically that a field from the SY (system) table is being used in a join condition, which is not allowed.
  
  Cause:
  
  Improper Join Conditions: The error usually arises when a query or report attempts to join fields from different tables, and one of those fields is from a system table (SY) that is not compatible with the other fields being joined.
  Field Mismatch: The fields being joined may not have a logical relationship or may not be of compatible data types.
  Query Design Issues: The design of the query or the data model may not