niriss image3 crashes with "MalformedPolygonError: intersection: find all intersections" about jwst HOT 6 OPEN

Comment by Howard Bushouse on JIRA:

Very bad looking step parameter values being assigned by the active pars-tweakregstep ref file for NIRISS images. Wouldn't be surprised if that's what's causing the failures.

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Comment by Howard Bushouse on JIRA:

Hien Tran Could you make the image3 asn file and the cal files listed therein available somewhere for SCSB to do testing? We want to make sure to use the exact same inputs as used in Ops.

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Comment by Rachel Plesha on JIRA:

Kevin Volk, Jo Taylor, André Martel, Tony Sohn, Paul Goudfrooij , I wanted to bring this ticket to your attention. There were some thoughts at the JP meeting yesterday that this might be due to some parameters that are set to bad values, specifically in the search radius and tolerance values when using tweakreg with the gaia3 absolute alignment in the parameter reference file. I'm not sure if any of this will be affected or fixed by the upcoming changes using the IRAF starfinder, but please chime in if you have any ideas about this error or upcoming updates to the values.

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Comment by Kevin Volk on JIRA:

The issue here seems to me to be that the image size is too small and there are not enough stars to make the tweakreg catalogue. This example is a photometric calibration observation with image size 128x128 pixels. The image attached shows the field in the rate image. There is just one star, the photometric standard, present. Apparently tweakreg is not finding this star (which is a problem in itself given the image...) and produces no catalogues for matching and so things crash.

The question is why it is crashing currently as opposed to in previous runs. The revisions to the tweakreg parameter files should not cause problems in an image like this. Nonetheless that may be the issue.

Howard commented that the tweakreg parameters seemed bad; but which ones?

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Comment by Hien Tran on JIRA:

Howard Bushouse i put the data in ████████████████████████████

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Comment by Mihai Cara on JIRA:

Are there specific instructions that could help me reproduce this issue?

I run:

pip install -r reqs_macos-stable-deps.txt```
where reqs_macos-stable-deps.txt was downloaded from here: <https://ssb.stsci.edu/releases/jwstdp/1.13.3/reqs_macos-stable-deps.txt>

I then run the step using strun, creating TweakRegStep object or creating Image3Pipeline object and running the step. Each time the step finished successfully (success here means not crashing, not performing a successful alignment).

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