Preprocessing script warning regarding master darks

[astrodoc71]

When I run the script I get the purple message: Warning: no correlation between master dark and target frames. The script runs fine and the files appear to be adequately calibrated. Not sure what the warning is all about. Doesn't seem to matter whether the dark frames are matched in time and temperature or not. The message still appears
Thanks
Dave

[Geoff]

There are lots of threads on this topic. Do a search on "no correlation between ...." and you'll get plenty of hits.

[astrodoc71]

Hmmm. Well I did that, and tried all of the message , part of the message and many different combinations of wording from the message and what I got was this message I posted and no others

[astrodoc71]

OK I found it! The search was "preprocessing master dark warning"
Regards
Dave