If you delete or move the imported images (usually named something like
myproject_imported_1.jpg, etc) and then attempt to open the project file,
The Panorama Factory displays the message
Cannot open file myproject_imported_1.jpg
Then you have the option of opening the file from an alternate location
if you have moved the image file.
However, if the image file is no longer available, clicking the
Cancel button should cancel opening the project. However,
instead it continues and attempts to open the next file. You are
forced to cancel every one of the missing image files and then close the
project.