Will Premiere Pro open if you create a new project? If it will, try importing your original project into the new one.
What if you try to open the project by double-clicking on it to start Premiere Pro, not opening Premiere Pro first and clicking the entry in the welcome screen?
What if you open Premiere Pro, create a new project and then go to File > Open Project?
What I'm getting at is that it seems like Premiere Pro isn't finding the project from the welcome screen, which is very different from Premiere Pro not being able to open the project file.
Are you using any external disk drives for anything project related?
Hi Todd both your solutions (and the one suggested by Colin) works initially. Dbl click the project file and it opens PPro. However, I tried this on another project which has a 3rd party pllugin (Smartsound Sonic Fire Pro) in it. Things get interesting with Smartsound being activated with me unable to quit out of it and I am not able to access Premier Pro. I have to Force Quit both programs. Then when I try to dbl click on the program that opened up OK the error message returns: File format not supported. There is no Smartsound file involved in this project? Same thread? New thread? many thanks for your responses