I installed AutoCAD 2016, and was still using 2012 and 2015 for other clients of mine. I was able to use all three versions since I installed 2016 about 2 weeks ago. Now I can't run any previous versions. 2012 gives me a Fatal error. 2015 tells me either 1) This version was not installed properly or 2) You don't have sufficient rights to run AutoCAD.
What happened, and how do I fix it?
Do you have any customization that might of been migrated?
We don't use that option, because it tends to break the 'older' version of AutoCAD if its still installed.
@Anonymous wrote:
.... I was able to use all three versions ... and how do I fix it?
For others who come along and discover this thread - when things are working, create Windows Restore Points.
Do it now!
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