How To Fix BO020 - Function module & was called up incorrectly

BO020 - Overview

• Message type: E = Error

• Message class: BO - General object number

• Message number: 020

• Message text: Function module & was called up incorrectly

What causes this issue?

Function module &V1& was called incorrectly.

System Response

The system canceled processing.

How to fix this error?

Check the call for function module &V1& in your program. Compare the
call with the documentation on function module &V1& (including the
comments in the source code). Find out where requirements for the call
were infringed and make the appropriate changes to your program.
A call is disallowed if, for example, there is a restriction on the
number of entries in a passed table and the table contains more entries
when the call is made.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BO020 - Function module & was called up incorrectly ?

  The SAP error message BO020, which states "Function module & was called up incorrectly," typically indicates that there is an issue with how a function module is being invoked in your SAP system. This error can arise from various causes, and understanding these can help in troubleshooting and resolving the issue.
  Causes of BO020 Error
  
  
  Incorrect Parameters: The function module may have been called with incorrect or missing parameters. Each function module has a specific interface that defines the expected input and output parameters.
  
  
  Data Type Mismatch: If the data types of the parameters being passed do not match the expected data types defined in the function module, this error can occur.
  
  
  Improper Sequence of Calls: Some function modules may require that certain other function modules be called first, or that they be called in a specific sequence.
  
  
  Authorization Issues: If the user does not have the necessary authorizations to execute the function module, it