How To Fix SK602 - Combination (&) and (&) is invalid

SK602 - Overview

• Message type: E = Error

• Message class: SK - SAPcomm messages

• Message number: 602

• Message text: Combination (&) and (&) is invalid

What causes this issue?

An invalid combination of service &V1& and document type &V2& was
entered.

System Response

A telecommunications request cannot be created with this combination of
service and document type.

How to fix this error?

- Correct the data entered.
- Check whether a suitable server can be configured.
Ask your system administrator to call transactions SCOM and SKRT.

Error message extract from SAP system. Copyright SAP SE.

SK602 - Details

• The SAP error message SK602, which states "Combination (&) and (&) is invalid," typically occurs in the context of SAP's controlling (CO) module, particularly when dealing with cost centers, internal orders, or other master data combinations. This error indicates that the combination of the specified elements (like cost center and internal order) is not valid according to the configuration or settings in the system.
  Causes:
  
  Invalid Master Data: The combination of the specified cost center and internal order may not exist in the system or may not be active.
  
  Configuration Issues: The configuration settings in the controlling area may not allow the specified combination. For example, certain cost centers may not be allowed to post to specific internal orders.
  Period Locking: The posting period may be closed, preventing any transactions from being recorded against the specified combination.
  Authorization Issues: The user may not have the necessary authorizations to post to the specified combination.
  
  Solutions:
  
  Check Master Data: