How To Fix /PF1/MSG_PO_GENERAL156 - Internal-/external flag was substituted from &1 to &2

/PF1/MSG_PO_GENERAL156 - Overview

• Message type: E = Error

• Message class: /PF1/MSG_PO_GENERAL -

• Message number: 156

• Message text: Internal-/external flag was substituted from &1 to &2

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PF1/MSG_PO_GENERAL156 - Internal-/external flag was substituted from &1 to &2 ?

  The SAP error message /PF1/MSG_PO_GENERAL156 indicates that there is an issue with the internal/external flag in a purchase order (PO) or related document. This message typically arises when there is a discrepancy between the expected internal or external status of a document and what is actually present in the system.
  
  Cause:
  The error message is triggered when the system detects that the internal/external flag for a particular document has been changed or substituted. This can happen due to various reasons, including:
  
  Data Migration Issues: If data has been migrated from another system, the internal/external flags may not have been set correctly.
  Manual Changes: Users may have manually changed the status of a document, leading to inconsistencies.
  
  Configuration Issues: Incorrect configuration settings in the system can lead to unexpected behavior regarding internal and external flags.
  Custom Development: If there are custom programs or enhancements that manipulate purchase orders, they may inadvertently change the internal/external flag.
  
  
  Solution:
  To resolve this