How To Fix CH123 - External document number assignment not allowed

SAP Error Message - Details

• 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 of the SAP system.
  Number Range Intervals: The number range for the document type may not be set up correctly, or it may be exhausted.
  
  Solutions:
  
  Check Configuration: Review the configuration settings for the document type in question. This can be done in the SPRO transaction under the relevant module (e.g., Materials Management, Financial Accounting) to ensure that the document type allows for external number assignment if that is desired.
  Use Internal Numbering: If the document type is configured to use internal numbering, ensure that you are not trying to enter an external number. Instead, let the system generate the number automatically.
  Adjust User Permissions: If the issue is related to user authorization, check the user roles and permissions to ensure that the user has the necessary rights to assign external document numbers.
  Review Number Ranges: Check the number range settings for the document type to ensure that it is correctly defined and that there are available numbers in the range. You can do this using transaction code SNRO (Number Range Objects).
  Consult Documentation: Refer to SAP documentation or consult with your SAP Basis or functional team for specific guidance related to your system configuration.
  
  Related Information:
  
  Transaction Codes: 
  
  SPRO (Customizing Implementation Guide)
  SNRO (Number Range Objects)
  SE11 (Data Dictionary) to check the table definitions related to document types.
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues or provide patches related to this error.
  User Forums: Consider checking SAP community forums or user groups for similar issues and solutions shared by other users.
  
  If the problem persists after checking these areas, it may be beneficial to engage with your SAP support team or a consultant who can provide more tailored assistance based on your specific system configuration and business processes.