files won't open

I have a series of architectural drawing that I have invested a great deal of time into and today I have one that will not open, I tried opening it directly or opening once I have opened with another drawing, it seems to open and then it crashes and application shuts off.

I am very concerned given the amount of time I have into these drawings and to lose one is very disheartening, Does anyone have ideas about how |I might get this drawing back. I have tried a few others and they all seem OK.

Thanks

Search for backup files, those with # at the beginning, or with .dxf~ file extension (remove the ~). You could provide the faulty file here for examination by a specialist like LordofBikes or send it to him personally (I am not a coder, can't help with this). There are sometimes complaints like this, perhaps the reason why this happens can be found.

excellent advice I was not aware of the backups it worked I have my drawing back!!!

Thanks