hi guys…
been working on something for a while..but when i selected my file for some reason it wont open never happened before? …is there another way to get it open?
so frustrating argh!!!
any advice is welcome ..

What actually happens when it won't open?

Do have a large geometry node network and/or running on 32-bit Windows which might run out of memory? If so, try changing the Edit > Preferences > Objects and Geometry > SOP Cache settings so that it uses a memory limit.

it throughs up an error along w ith the error sound, the error message reads invalid file…im using 64 bit just tried what you said but no luck. any other options?

I think you got the answer.