Hi Exports,
I just tried to open an AutoCAD file it opened fine then 45 seconds later I get an "AutoCAD LT Error Aborting"
Says:
"INTERNAL ERROR: !U:\global\src\corecad\coresrc\laymgr.cpp@955: eLock VIolation"
Having Saved the file to the desktop the error message became:
Fatal Error: Unhandled Access Violation Reading 0x0040 Exception at 6bf87eh
What does this mean and how do I overcome it to be able to view the file?
Thanks!

sounds like a weird file lock issue. AutoCAD crashed, then when going back in, thought the file was in use.. or something like it.
have you tried rebooting the pc? I hope you backup your files if they are important and not easily recreated. some sort of file versioning is advisable if you are working on CAD / Image / Video processing where projects are worked on for lengthy periods. Windows has file shadow copies that can help.. maybe not this instance, but in future.