How To Fix GK173 - Use of document type for posting external documents not permissible

GK173 - Overview

• Message type: E = Error

• Message class: GK - Messages for SAP Consolidation

• Message number: 173

• Message text: Use of document type for posting external documents not permissible

What causes this issue?

The use of document type &V1& is not permitted for posting external
documents.

System Response

The system prevents posting of external documents by issuing an error
message in the task log.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

GK173 - Details

• The SAP error message GK173, which states "Use of document type for posting external documents not permissible," typically occurs when you attempt to post an external document using a document type that is not configured to allow such postings. This can happen in various SAP modules, particularly in Financial Accounting (FI) or Controlling (CO).
  
  Cause:
  
  Document Type Configuration: The document type you are trying to use for posting an external document is not set up to allow external postings. Document types in SAP are configured with specific settings that determine how they can be used.
  Posting Rules: The system may have specific rules or restrictions in place that prevent the use of certain document types for external documents.
  User Authorization: The user may not have the necessary authorizations to post using the specified document type.
  
  
  Solution:
  
  
  Check Document Type Configuration:
  
  Go to the transaction code OBAY (for document type configuration).
  Look for the document type you are trying