Hi @Jesmine,
Could you show us what is being returned from python function/script i.e., what value are you trying to return?
def something(input):
return ??
Some threads for you to read about Pipe is broken error, which I have come across and some reasons for it.
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How to properly return values from python to UiPath Invoke Python Method: Pipe is broken - Help / Activities - UiPath Community Forum
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Use CSV file as an input for a Python Activity doesnt work - Help / Studio - UiPath Community Forum