How To Fix M8182 - Entry of an external document number not allowed

M8182 - Overview

• Message type: E = Error

• Message class: M8 - Invoice Verification/Valuation

• Message number: 182

• Message text: Entry of an external document number not allowed

What causes this issue?

Your system is configured in such a way that document numbers are issued
by the system. The field <LS>Document number</> must be left empty.

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

System Response

How to fix this error?

Delete the number in the field <LS>Document number</>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M8182 - Entry of an external document number not allowed ?

  The SAP error message M8182, which states "Entry of an external document number not allowed," typically occurs in the context of material management or inventory management processes. This error indicates that the system is preventing the entry of an external document number in a situation where it is not permitted.
  Causes:
  
  Configuration Settings: The system may be configured to disallow the entry of external document numbers for certain transactions or document types.
  Document Type Restrictions: The specific document type you are trying to use may not allow external document numbers.
  User Authorizations: The user may not have the necessary authorizations to enter external document numbers.
  Transaction Context: The error may arise in specific transactions where external document numbers are not applicable, such as certain goods movements or inventory adjustments.
  
  Solutions:
  
  Check Configuration: Review the configuration settings in the SAP system for the relevant document types and transaction codes. Ensure that the settings allow for the entry of