How To Fix W_001 - Internal error when calling a function module

W_001 - Overview

• Message type: E = Error

• Message class: W_ - Upload CRM -> R3 BOMs / Structured Materials

• Message number: 001

• Message text: Internal error when calling a function module

What causes this issue?

When a function module was called up, an error was recognised, and an
exception was triggered.

System Response

Processing cannot be carried out.

How to fix this error?

This is a system error. Inform your system administrator. The error has
occurred in function module &V1&. The return value was &V2&.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message W_001 - Internal error when calling a function module ?

  SAP Error Message:
  W_001 Internal error when calling a function module
  
  Cause
  This warning message typically occurs when there is an internal error during the execution of a remote function call (RFC) or a function module call within SAP. The causes can vary, but common reasons include:
  
  Incorrect or inconsistent data passed to the function module.  
  Authorization issues preventing the function module from executing properly.  
  Missing or incorrect parameters in the function call.  
  System or communication errors during RFC calls (e.g., network issues, system load).  
  Function module itself has a bug or is not properly implemented.  
  Incompatible SAP kernel or patch level causing unexpected behavior.  
  Buffer or memory issues in the SAP system.  
  
  
  Solution
  To resolve the W_001 Internal error when calling a function module warning, follow these steps:
  
  
  Check the exact function module name and parameters:  
  
  Verify that the function module is called with the correct parameters