I have an issue opening existing files on Icepak 19.0. When I click on 'Existing' to open an an existing Icepak file, I get the error attached in the picture below. I am able to unpack tzr files and open them up on Icepak, however I am unable to load existing files. Since I would need to load existing files to recover previously saved solutions, this is not ideal. Can someone tell me how I go about addressing this issue?