I am getting one issue on one of my script which is working for other windows

[Kunal_Purohit1]

I am attaching the image of it and any one can help me let me know.

[Transistor]

Please post the text of the scripts so we don't have to type them out again. Format them correctly using the </> button.

[cmallonee]

1. As @Transistor suggested: we need the code, not a picture (though pictures of the stacktrace are great when you can't copy the stacktrace). At least some of your code is cut off in the screenshot, so I can't see what you're supplying for the aggregationModes kwarg.
2. Don't return different value types based on conditions; your if block returns an empty list/array, while your else block returns a DataSet.

[Kunal_Purohit1]

Thank you a lot.