nway-create-fake-catalogue ValueError

[mn-velazquez]

Hello,
I recently used the nway-create-fake-catalogue.py command. However, when I try to create the fake catalogue, I get a "ValueError: high <= 0." I have attached the traceback error message here. I was wondering what could be the issue, and what are ways to resolve it?

Thank you.

[JohannesBuchner]

There are no sources found nearby, so it could not generate a new source in between.

Stare at your input file for a bit, and try to understand the method of nway-create-fake-catalogue.py

Perhaps you want nway-create-shifted-catalogue.py

Often you need to create your own custom fake catalog for testing per-chance associations, which makes sense for your problem. This depends on your survey coverage, layout, error sizes, and other details.

There should probably be a better error message for this. Adding
assert len(b_nearest)>0, "Method failed: No sources found nearby, could not interpolate a fake source."
above should help. If you have time, could you make the change through a pull request?