Error in saving the experiment

Hi, I am experiencing an error when I am trying to save an experiment. The experiment usually saves fine initially, but in the process somewhere I believe I do something which then prevents me from saving the experiment. The error looks like this " The file is already open". The only way out is to save the experiment as a new file. Could anybody help me with this error? Thank you
hrodstein
You don't say what version of Igor you are using or what OS. This problem is usually caused by a virus scanner or some other intrusive software opening the file while Igor is trying to access it. If possible, tell your virus scanner not to scan .pxp files. A workaround is to do a save-as to a different file name. The problem also occurred when saving to a remote volume such as a Google Drive volume. I added a workaround in Igor7 for that problem a few months ago.