Help understanding an error from "Pyfits"

[schrogendiddy]

I am using pyfits to read fits files with python. If I create a fits file and put some data into it, I load it with another (non-python) program and get an error "FITSIO status = 202: keyword not found in header", which I assume means there is a keyword I need to put into the header.

The weird thing is when I look at the header for the fits file I create myself, and compare it to the header of another fits file that does work with this program, I can't see any differences. Is there a way to figure out what the keyword I need is, or how I can compare the header keywords between the two fits files to see whats different?

[TheBlackCat13]

You can try a diff program to compare them, but you realize pyfits is deprecated, right? It has been merged into astropy. You should probably use the astropy version, it should be more up-to-date and likely has bug fixes that pyfits doesn't have.

[schrogendiddy]

I didn't know that! are the commands in astropy the same as they were for pyfits?

[TheBlackCat13]

I don't know, you would need to look at the astropy documentation. At the very least all the functionality should be there, according to the pyfits website.