Hi - I try to run DWG viewer or autocad design and it says it can't run a Heidi file, whatever that is. So i go and on the dwg file it says i need to run a .400 . net file - so I go to MS and load that plus some updates. I go restart the computer ( a dell optiplex 390 win 7 pro ) and still no love. What can I do to get this to run properly? I used to have Volo view and and an earlier version of design review and they ran just fine on my (now dead) xp machine. Help please.
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