How To Fix CH123 - External document number assignment not allowed

CH123 - Overview

• Message type: E = Error

• Message class: CH - CAD/PP integration messages

• Message number: 123

• Message text: External document number assignment not allowed

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 CH123 - External document number assignment not allowed ?

  The SAP error message CH123 ("External document number assignment not allowed") typically occurs when there is an attempt to assign an external document number in a context where it is not permitted. This can happen in various scenarios, such as during the creation of a document in the SAP system (e.g., a purchase order, invoice, or other financial documents) where the system is configured to generate document numbers internally rather than allowing external assignment.
  Causes:
  
  Configuration Settings: The document type or number range configuration may be set to disallow external number assignment. This is often the case for certain document types that are meant to be internally controlled.
  Document Type Restrictions: Some document types in SAP are configured to only allow internal number assignment, which means that users cannot manually enter an external document number.
  User Authorization: The user may not have the necessary permissions to assign external document numbers, depending on the configuration