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Can not load STL4CAD program in AutoCAD 2009 x64

I installed your STL4CAD 2007 - Export STL application and when I try to load it into AutoCAD 2009 64 bits version I get an error message "Unable to load STL4CAD.arx file". How to load STL export application into my version of AutoCAD?

STL4CAD 2007 - Export STL application works with AutoCAD 2007, 2008, 2009 and other vertical products like AutoCAD 2009 Mechanical, AutoCAD 2007 Electrical or AutoCAD 2008 Map. However it is only a 32 bits application and it will not be accepted by the 64 bits edition of AutoCAD 2009.

We are sorry for the inconveniences, but currently we do not support x64 platform at all and as a consequence we do not have any special version of STL4CAD - Export STL application for AutoCAD 64 bits system. Please notice that our other AutoCAD applications also do not support 64 bits platform yet.

Nevertheless we work hard to support the 64 bits operating system as Autodesk does for their AutoCAD product and plan to release a new version of our STL4CAD - Export STL add-on for AutoCAD 2009 x64 soon.