Execute macro - threading issue

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Hello, I use Excel Application Scope/Execute macro and got the attached error. I have a kill process (kill excel) before. Does anyone know what caused this (the macro was tested and works fine).

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Hi @Lynn_Song ,

The error message you’re encountering is related to a threading issue when interacting with Excel via COM objects in UiPath. This typically happens when the application tries to access an interface that was marshalled for a different thread. Here are a few steps to resolve this issue:

  1. Use Excel Application Scope Properly: Ensure that all Excel activities are enclosed within an Excel Application Scope. This helps manage the lifecycle of the Excel application properly.
  2. Add a Delay: Sometimes, adding a small delay before executing the macro can help if the issue is caused by the Excel application not being fully ready.
  3. Avoid Multi-threading Issues: Ensure that the UiPath robot is not executing any parallel activities that might interfere with the Excel COM object.
  4. Set the ‘Visible’ Property: Sometimes setting the Excel Application Scope’s ‘Visible’ property to ‘True’ can help as it ensures that Excel is properly initialized.
  5. Kill Process Before Starting: You mentioned already using a Kill Process activity for Excel. Make sure this activity is configured correctly and that no other Excel processes are running before starting the Excel Application Scope.
  6. Try/Catch Block: Use a Try/Catch block to handle exceptions gracefully and retry the activity in case of failure.
  7. Update Excel Activities Package: Make sure you are using the latest version of the UiPath.Excel.Activities package. Sometimes, updating the package resolves underlying issues.

Regards
Sandy

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Thank you so much for your help, I’ll try them out.

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