File seems to contain error and could not be loaded!

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Hi
Ive been working on a project for the past 3 weeks. I saved it again as usual, but this morning i tried opening it and it displayed an error message. I tried recovering it using the .bak file, and that didnt work either! Is there a solution for this, because I really don't want hours of work to go to waste :(
Hello and welcome to the forums doc47. :)

Wow! This is a strange problem.
So you used the Bak. file and that didn't work. Interesting.

Did you use a 3rd party vst plugin, in your project?
If so, can you tell us the name, of that vst plugin and the
version of Lmms, that you are using? :geek:

Also if possible, please tell us your computer specs and the OS that you're using.
eg. win10, or mac osx etc.
That way, we can pinpoint this problem easily.