How To Fix WS_TOOL220 - No function module selected!

SAP Error Message - Details

• Message type: E = Error

• Message class: WS_TOOL - Message Class for Web Services and Virtual Endpoints

• Message number: 220

• Message text: No function module selected!

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WS_TOOL220 - No function module selected! ?

  SAP Error Message:
  
  WS_TOOL220 No function module selected!
  
  Cause:
  This error typically occurs in the context of SAP Workflow or Business Object Repository (BOR) when you are trying to assign or use a function module in a workflow step or tool, but no function module has been selected or assigned.
  More specifically:  
  
  When defining a workflow step that calls a function module, the system expects a valid function module to be assigned.  
  If the function module field is left empty or the selected function module is invalid or deleted, the system raises this error.  
  It can also occur if the workflow tool configuration is incomplete or corrupted.
  
  
  When does it occur?
  
  While creating or editing a workflow step that requires a function module.  
  When generating or testing workflow tools that rely on function modules.  
  During workflow runtime if the workflow step is incorrectly configured.
  
  
  Solution:
  
  
  Check the Workflow Step Configuration:  
  
  Go to the workflow builder (transaction SWDD).  
  Open the step that is causing the error.  
  Verify that a valid function module is assigned in the step’s method or tool settings.
  
  
  
  Assign a Valid Function Module:  
  
  If no function module is selected, assign the correct one.  
  Use the search help or F4 help to find the appropriate function module.
  
  
  
  Verify Function Module Existence:  
  
  Use transaction SE37 to check if the function module exists and is active.  
  If the function module is missing or deleted, restore or recreate it.
  
  
  
  Check Workflow Tool Configuration:  
  
  If the error occurs in a workflow tool, check the tool configuration in transaction SWO1 or SWO2.  
  Ensure the function module is properly linked to the tool.
  
  
  
  Transport and System Consistency:  
  
  If the workflow or function module was recently transported, ensure the transport was successful and objects are consistent in the target system.
  
  
  
  Debugging:  
  
  If the error persists, debug the workflow runtime to identify where the function module is expected but missing.
  
  
  
  
  Related Information:
  
  Transaction Codes:  
  
  SWDD - Workflow Builder  
  SE37 - Function Module Builder  
  SWO1 / SWO2 - Business Object Builder / Workflow Tools  
  
  
  SAP Notes:  
  
  Check SAP Notes related to workflow errors or function module assignments if the problem is system-specific.  
  
  
  Documentation:  
  
  SAP Help Portal on Workflow and BOR for detailed configuration steps.  
  
  
  Common Scenario:  
  
  When creating custom workflow steps, always ensure the function module is correctly assigned and tested.
  
  
  
  
  Summary:
  The error WS_TOOL220 No function module selected! means that a workflow step or tool expects a function module to be assigned but none is selected. To fix it, assign a valid function module in the workflow step or tool configuration and ensure it exists and is active in the system.