How To Fix B1252 - Function module not allowed: &

B1252 - Overview

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 252

• Message text: Function module not allowed: &

What causes this issue?

The function module &v1& and the application object type &v2& which
were determined are not valid for this IDoc.

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?

Please check that the process code in the <DS:TRAN.WE20>inbound
partner profile</> is correct.
If this is the case, you should check the ALE inbound methods
<DS:TRAN.BD67>ALE inbound methods for the process code</> and see
whether the specified function module and application object type are
correct.
If this is also the case, then the function module and the application
object type are not permitted for the logical message type, message
variant, message function and basis type that are contained in the IDoc
control record. You should check whether the correct values have been
assigned to these fields in the control record. If they do have the
correct values, then the <DS:TRAN.WE57>assignment</> to the function
module and the application object type needs to be maintained.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message B1252 - Function module not allowed: & ?

  The SAP error message B1252, which states "Function module not allowed: &", typically occurs when there is an attempt to call a function module that is not permitted in the current context or environment. This can happen for several reasons, including:
  Causes:
  
  Authorization Issues: The user may not have the necessary authorizations to execute the specified function module.
  Function Module Restrictions: The function module may be restricted from being called in certain contexts, such as within a specific transaction or program.
  Incorrect Configuration: There may be configuration settings that prevent the execution of the function module.
  Transport Issues: If the function module was recently transported from another system, it may not be properly activated or may have dependencies that are not met.
  
  Solutions:
  
  Check Authorizations: Ensure that the user has the necessary authorizations to execute the function module. This can be done by checking the user's roles and authorizations in transaction SU53 or SUIM.
  Review Function Module: Check