When running either OSC_Preprocessing.ssf OR OSC_Extract_HaOIII.ssf in SIRIL 1.4.2, the following error appears in the console:
SIRIL could not load image 0 from sequence bias
This issue does not occur in SIRIL 1.4.1; rolling back to 1.4.1 resolves the issue. Note that links are created in the “process” directory, but SIRIL is evidentially looking for the wrong path.
Nothing has changed in this area between 1.4.2 and 1.4.1 as you can check in the changelog.
I also have this problem. The scripts (e.g. DSA-Seestar_Mosaic_Preprocessing v1.0) which were working under 1.4.1 are crashing under 1.4.2. Developer mode is on. The command “link light -out=…/process” is creating symbolic links which the subsequent command “calibrate light” doesn’t like for some reason:
FITS error: failed to find or open the following file: (ffopen)
FITS error: light_00001.fit
Could not load image 0 from sequence light_
Same problem here with 1.4.2 and 1.4.3 for Windows: Siril reports “FITS error: biases_00001.fit”. The file names are very different from what is stated in the error message. They resemble something like “Bias_1.0ms_Bin1_20260518-063920_49deg_0001.fit”.
Switching to Siril 1.4.1 allows me to process the files without any error. Looks like some change has been made which turns out to be a bug for Windows users. Let me know if you want me to provide more details such as example files to reproduce the problem.