I have the impression that with the new updates, PixInsight's problems have increased. or maybe I'm probably ... However I expose the problem: generally I launch the prepocessing for a quick check of the result, I insert in the outpud dirctory the directory already prepared as I have always done only that this morning has given me this morning gave me the message "impossible to create directory" never appeared before. I repeat the procedure and instead of assigning the existing directory, I click on the folder and create a new one from PixInsight. ok all right, but at the end of the processing another error message appears, never appeared before, (use the program for two years) invalid argument. someone can tell me something about it I have version 1.8.8-2 and it runs on the mac book pro os.Catalina, light dark flate bias are in fit format. Thanks and sorry for my bad English