I got "Invalid length parameter passed to the left or Substring function" when I tried to action a task.
Best answer by paulk
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This sounds like somewhere you are trying to do some string manipulation (LEFT) on the value that you are sending back to the Acton value of the workflow.
I've never seen it being a problem with task action values unless you don't pass a value, or pass a value that isn't valid for the action, neither of those would cause the above error message though.
Cheers
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