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I'd be very careful going back and forth between Microstation and 
AutoCAD primarily because when you import a Microstation drawing into 
AutoCAD the linetypes will cause the file size to balloon out of 
control.  It is such a bad problem that AutoDesk released a hotfix that 
deletes the linetypes so as to reduce the file size.

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John Connor Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 01.Feb.2011 Location: United States Using: AutoCAD 2018 Status: Offline Points: 7175	Topic: Slow Solid Model Posted: 06.Nov.2014 at 11:42
	I'd be very careful going back and forth between Microstation and AutoCAD primarily because when you import a Microstation drawing into AutoCAD the linetypes will cause the file size to balloon out of control. It is such a bad problem that AutoDesk released a hotfix that deletes the linetypes so as to reduce the file size.
	"Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance." <<AutoCAD 2015>>

bfackrell Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 03.Mar.2012 Location: United States Using: AutoCAD, Rhinoceros Status: Offline Points: 3	Posted: 06.Nov.2014 at 02:04
	Thanks for the tips. I purged, with no change. Then I did a bind of the XREF's (still slow) then opened it in Microstation did some things and re-opened in AutoCAD and it works great! Not sure what Microstation did but it fixed the problem.

John Connor Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 01.Feb.2011 Location: United States Using: AutoCAD 2018 Status: Offline Points: 7175	Posted: 05.Nov.2014 at 11:39
	What kind of file size are you dealing with? What are the full specs of your computer? My initial suggestion would be twofold. First. Use Overkill, -Purge (Regapps first; All second) and Audit on the drawing. Twice. Then save. Does the file size reduce at all? Second. Make use of Xrefs.
	"Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance." <<AutoCAD 2015>>

philippe JOSEPH Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 14.Mar.2011 Location: France Using: AutoCAD Mechanical 2017 Status: Offline Points: 1494	Posted: 05.Nov.2014 at 07:50
	Hello bfackrell, if you want to work with big 3D files and your computer is slow you will have to use : BLOCKS on each component with adequate names to manage them with their aflabetic numbering. PURGE, SCALELISTDELALL. If all this doesn't work you will have to go to XREF like with Solidworks for example that's to say drawing each component in different files and be very carefull with the names and places of each files and directory not to move rename, etc... If you go to XREF each time you will insert a component in your "assembly" file you will get more and more layers with a complex name ( don't know if this can be "cuted off" ). Tell us if this helped or not, your tests and results. Edited by philippe JOSEPH - 05.Nov.2014 at 07:55

bfackrell Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 03.Mar.2012 Location: United States Using: AutoCAD, Rhinoceros Status: Offline Points: 3	Posted: 04.Nov.2014 at 23:58
	I have a large structural steel and concrete model that was modeled in AutoCAD 2010 as solids. It's been years since I last used AutoCAD but this does not seem like the appropriate platform for such a large solid project. My system is more than adequate for AutoCAD but the geometry is so bulky that I can't do anything with it. Any suggestions? Is there a way to make my geometry more manageable within AutoCAD or should I move it to another application? I have Revit but from what I've read, it does not seem feasible to move the geometry to Revit.

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