Unable to load ARX file

[Tony Greene]

After downloading nXt I am unable to load the ARX file. I have tried both appload and dragging the arx from explorer to AutoCAD screen. Using Windows 7 64 bit with AutoCAD Architecture 2008. The plant and material editor applications seem to work fine. I have tried both the latest version and the latest stable version. Installation seemed to go fine without any errors. Any ideas?

[Roy Hirshkowitz]

Do you have 64 bit or 32 bit AutoCAD? (With 2008 it's actually possible to run the 32 bit version on a 64 bit OS.)

If you're unsure run Task Manager and AutoCAD-- look on the Processes Tab and see if a *32 appears next to acad.exe. If it does, you've got 32 bit AutoCAD and you must load 32 bit nXt-- if not you've got 64 bit AutoCAD and you must load 64 bit nXt.

[Tony Greene]

It seems that it was a *32 application, thanks Roy, that did the trick

[Roy Hirshkowitz]

Just keep in mind that running this way you will be limited to 3GB of address space. In other words, you won't benefit from the 64 bit environment with its ability to handle very large data sets. You may with to consider upgrading AutoCAD at some point.