dwg file not valid but works on other computer

[Anonymous]

I received a dwg file from my architect through e-mail.  When I open it in Autocad LT 2004, a window pops up stating, "Drawing file is not valid."  I forwarded the e-mail on to my boss with the same file and it opens perfectly on his version of Autocad LT 2004.

The only difference between our computers is that he is running Windows 7 and I am running Windows XP.  The architect is running Windows 7. 

Please help me open this file!

[Charles_Shade]

Try opening the file from your side using RECOVER.

Try having the Boss run an AUDIT of the file and then possibly saving to a new name.

Post the file here if you can for others to look at.