We meant your original picture.
Because of course there are no issue doing this on an already solved image.
Hi Lock,
I thought you access the original as well from the link.
how do I upload or share the original fit file? It’s 395mb.
Cheers,
Tony
A service like wetransfer allows you to upload large files.
Thank you Lock. 
Hi again Tony,
phometric calibration does work as expected in Siril 1.0.0 so I’m not sure what is going wrong on your end:
(your picture is glorious BTW!)
Cheers,
C.
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I’m glad you like the image Cissou. Still not working at my end, it will search & find the DSO ok but regardless of which search result I choose it will fail every time. As soon as I press the “OK” button at the bottom I immediately get the Fail notification. It’s like it doesn’t even try. 
. I’ll reinstall again to see if that rectifies the problem as it did before.
Cheers,
Tony
What operating system are you using?
Not in front of the computer right now but not sure i was getting more than one object to select.
The steps i’ve been going through are:
- Load your image as is (no histogram transformation, stretch, no selection in the picture or the like)
- Type eta carina in the search box
- Press Find
- Select the object (doesn’t matter that much in fact, it’s just a matter of specifying roughly the center of the image. Differents catalogues will return slightly different values but all RA/Dec should match from one to the other).
- Fill in focal length and pixel size
- Press OK
Anything you may be doing differently?
Maybe you could paste the part of the log related to this here, see if we can spot anything peculiar?
C.
Hi Vincent,
Thank you for your interest. My PC configuration is;
Intel(R) Core™ i7-4790K CPU @ 4.00GHz
Installed RAM 32.0 GB
System type 64-bit operating system, x64-based processor
Windows 10 Home Version 21H2.
Cs,
Tony
Please, disable your AV for testing purpose and retest the color calibration.
My procedure is exactly as you have described Cissou. Since my last post I reinstalled Siril again & plate solving / photometric calibration is working again so I believe we have ruled out any problem with my data, my procedure & Sirils ability. Reinstallation rectifies the issue (for how long remains to be seen), I believe the problem is related to the OS. I have looked at the system event viewer but couldn’t find any evidence relating to Siril there. How to diagnose this any further within the OS is beyond my capabilities but maybe the information from this thread can help someone more tech savvy to isolate the issue.
Cheers,
Tony
Yes I did try that Lock. It made no difference unfortunately. I reinstalled Siril which has solved the problem for the time being at least. My belief is that the OS is responsible somehow.
Cheers,
Tony
Could you show me your output logs?
Here is a screenshot of an image I just loaded which Siril plate solved successfully after the reinstall.
I’m not sure it’s possible access any output logs from any earlier sessions prior to the reinstall.
Unfortunately I didn’t save any from the failed sessions.
Cheers,
Tony
I thought I’d post an update to share my expeience with this issue & thank Cissou & Lock for their interest and support. My last post showed plate solving worked again after reinstalling Siril, following that I closed Siril & opened it again a few hours later. As you might have guessed plate solving was no longer working.
If look at the output log only 2 seconds elapse before getting the “Fail” notice, perhaps this is something of note. So after several failed attempts I reinstalled Siril again & plate solving worked like a charm every time & continued to do so as long as I kept Siril open. When I restart Siril plate solving fails again. This is the case consistently. So what happens to Siril after it is closed to prevent plate solving working when it is reopened again? Your guess is as good as mine. Is it my computer or is my experience consistent with other users with the same OS? All I can say is that reinstalling Siril solves the issue 100% of the time. Perhaps someone else with the same problem can chime in?
Cheers,
Tony
I am on windows 11 and have no issues. Just an informational post here
Che
If this was a consistent behaviour we would probably have been notified about it by many users. But since you’re with Windows, there is a random factor of the good will of microsoft and all other installed software: antivirus, firewalls and similar security systems, as siril is connecting to a remote website for this operation.
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Agreed, thank you for your input Vincent. It seems as though this issue is peculiar to my OS/PC. I’ll try to trace it via Windows logs.
Cheers,
Tony