Error randomly occuring while reading FITS file multiple times

[Baphometsixsixsix]

The FITS() function works well for a certain number of times and then suddenly throws up error. Any idea why could this be happening?

using FITSIO
FITS("/home/archisman/FITSfile1.fits")

File: /home/archisman/FITSfile1.fits
Mode: "r" (read-only)
HDUs: Num Name Type
1 Image
2 SPECTRUM Table

j = 0
for i in 1:100000
    FITS("/home/archisman/FITSfile1.fits")
    j+=1
end

CFITSIO has encountered an error while processing /home/archisman/FITSfile1.fits. Error code 104: could not open the named file
Detailed error message follows:
failed to find or open the following file: (ffopen)
/home/archisman/FITSfile1.fits

Stacktrace:
[1] fits_assert_ok
@ ~/.julia/packages/CFITSIO/BfhtD/src/CFITSIO.jl:225 [inlined]
[2] fits_open_file(filename::String, mode::Int64)
@ CFITSIO ~/.julia/packages/CFITSIO/BfhtD/src/CFITSIO.jl:380
[3] FITS(filename::String, mode::String; extendedparser::Bool)
@ FITSIO ~/.julia/packages/FITSIO/ggf1s/src/FITSIO.jl:183
[4] FITS (repeats 2 times)
@ ~/.julia/packages/FITSIO/ggf1s/src/FITSIO.jl:181 [inlined]
[5] top-level scope
@ ./In[3]:3

j
4043

[giordano]

My guess is that you can't open an already opened file? Note that this is failing in the C library CFITSIO underlying this package.

[Baphometsixsixsix]

I encountered this error for first time while trying to iterate over thousands of FITS files in a folder. I thought maybe some of those files are corrupted so I tried it on a file which I successfully opened earlier. I've posted what happened next in the original issue.

[giordano]

Again, this is failing inside CFITSIO, there isn't much we can do about this unless you can prove this only happens in this package and not in a pure C equivalent program.