How To Fix MM155 - You cannot maintain document assignments here

MM155 - Overview

• Message type: E = Error

• Message class: MM - Messages for material master maintenance and Customizing

• Message number: 155

• Message text: You cannot maintain document assignments here

What causes this issue?

You wanted to maintain document assignments. However, this is not
possible in the following cases:
When scheduling the creation or changing of a material
If document management is not active for the material master (that is,
you have not specified the standard document type in Material Master
Customizing under <LS>Material</> -> <LS>Control Data</> -> <LS>Make
global settings</>)

System Response

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

How to fix this error?

Check and extend your data as required.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MM155 - You cannot maintain document assignments here ?

  The SAP error message MM155, which states "You cannot maintain document assignments here," typically occurs in the Materials Management (MM) module when a user attempts to perform an action that is not allowed due to the current context or settings in the system. This error often arises when trying to maintain document assignments for purchasing documents, such as purchase orders or contracts, in a situation where the system does not permit it.
  Causes:
  
  Incorrect Transaction Context: The user may be in a transaction or screen that does not allow for document assignments to be maintained.
  Document Status: The document you are trying to modify may be in a status that does not allow changes (e.g., it may be completed, archived, or locked).
  Authorization Issues: The user may not have the necessary authorizations to maintain document assignments.
  Configuration Settings: Certain configuration settings in the SAP system may restrict the ability to maintain document assignments for specific