If you use VBA inside of 32bit AutoCAD you will have noticed that it is around 1000x times slower when running the same VBA code inside of 64bit AutoCAD.
This is because AutoCAD 64bit ships with the 32bit VBA DLL in a separate out-of-process executable rather than loading the VBA DLL inside of AutoCAD itself. Therefore, a lot of marshaling is incurred communicating between the out-of-process VBA executable and 64bit AutoCAD.
Other issues you may be seeing: Run-time error ‘429’: ActiveX component can’t create object
Affected, all 64bit versions of (and variants of)
The best solution is to install 32bit AutoCAD on 64bit Windows, here are the affected versions along with their solution text…
AutoCAD VBA enabler modules can be downloaded using the links below…
AutoCAD 2010 VBA 32bit 64bit | AutoCAD 2011 VBA 32bit 64bit | AutoCAD 2012 VBA 32bit 64bit | AutoCAD 2013 VBA 32bit 64bit | AutoCAD 2014 VBA 32bit 64bit | AutoCAD 2015 VBA 32bit 64bit | AutoCAD 2016 VBA 32bit 64bit | AutoCAD 2017 VBA 32bit 64bit | and newer
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