How To Fix WS_TOOL877 - Function &1: &2 parameter &3 type has changed

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 877

• Message text: Function &1: &2 parameter &3 type has changed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WS_TOOL877 - Function &1: &2 parameter &3 type has changed ?

  The SAP error message:
  WS_TOOL877 Function &1: &2 parameter &3 type has changed
  typically occurs during the import or transport of function modules or function groups when the parameter type of a function module has been changed in the source system compared to the target system.
  
  Explanation / Cause
  
  
  Cause:
  
  The error indicates that the type of a parameter in a function module has been changed in the source system after the function module was originally created or last transported to the target system. When you try to import or activate the function module in the target system, SAP detects that the parameter type differs from what is currently defined there.
  
  
  This can happen if:
  
  The parameter type was changed manually in the source system (e.g., changing the data element, table type, or structure type of an importing/exporting/changing parameter).
  The function module was modified in the source system but the changes are inconsistent or incompatible with the target system.
  The transport request contains inconsistent or incomplete changes related to the function module parameters.
  
  
  
  
  Solution
  
  
  Check the parameter type changes:
  
  Go to the function module in the source system (transaction SE37).
  Check the parameter &3 (the parameter name given in the error) and note its type.
  Compare it with the same function module and parameter in the target system.
  
  
  
  Synchronize the function module:
  
  If the change is intended and correct, ensure that the transport request contains all necessary changes.
  Re-transport the function module or function group after making sure all dependent objects are included.
  
  
  
  Adjust the parameter type manually (if needed):
  
  If the parameter type change is not intended or causes issues, revert the parameter type in the source system to match the target system.
  Then re-transport the function module.
  
  
  
  Use the Function Builder to activate:
  
  Sometimes, after import, you may need to manually activate the function module in the target system (SE37).
  If activation fails due to type mismatch, fix the parameter types as above.
  
  
  
  Check for inconsistent transports:
  
  Make sure that all related objects (data elements, structures, table types) used in the parameter types are transported and consistent in the target system.
  
  
  
  If the problem persists:
  
  Use transaction SE80 or SE37 to compare the function module interface.
  Use SAP notes or OSS messages if this is a known transport/import issue.
  
  
  
  
  Related Information
  
  
  Transaction Codes:
  
  SE37 (Function Builder)
  SE80 (Object Navigator)
  STMS (Transport Management System)
  
  
  
  SAP Notes:
  
  Check SAP Notes related to transport errors involving function modules.
  Example: SAP Note 102011 (related to function module interface changes and transports).
  
  
  
  General Advice:
  
  Always ensure that changes to function module interfaces are carefully planned and transported.
  Avoid changing parameter types in productive systems without proper testing.
  Use transport sequences to ensure dependent objects are transported in the correct order.
  
  
  
  
  Summary
  
  
  
  Aspect
  Description
  
  
  
  
  Cause
  Parameter type of a function module changed in source system, causing mismatch on import.
  
  
  Solution
  Compare and synchronize parameter types; ensure all dependent objects are transported; activate function module.
  
  
  Related
  SE37, SE80, STMS, SAP Notes on transport errors and function module interface changes.
  
  
  
  
  If you provide the exact function module name, parameter name, and the old/new types, I can help you with more specific guidance.