Overview
Key Features & Functionality
I believe this is a bug: when running the smart service (in my case, successive throwaway test runs), if the output file name matches an existing file (presumably in the same folder, though I didn't test this), it seems to not even genereate anything; there is simply no file created, nothing saved into the "new excel document created" ACP or PV, but also nothing in "Error Message" and the "Error Occurred" output is left as "false" as if nothing had gone wrong.
Since Appian doesn't rely on unique file names in any sense, this seems like an unintentional error. But if it's the intended functionality (for reasons I don't quite understand), then I would suggest the smart service be updated such that an error message is thrown when it happens, since if this happens in the wild it will probably only create confusion.