32bit vs. 64bit

[fwp]

I have written a basic HelloWorld app in Visual Studio 2008 C# and added the appropriate code to my Revit.ini file, both on my 32bit laptop OS and also on my 64bit Vista desktop. The app loads and runs fine on the 32bit system but will not load on the 64bit system. The ExternalCommands blocks are identical on each system and Revit is reporting no errors.

Here's the Revit.ini entry:

[ExternalCommands]
ECCount=1
ECClassName1=HelloWorld2.Class1
ECAssembly1=C:\Projects\HelloWorld2\HelloWorld2\bin\Release\HelloWorld2.dll
ECName1=HelloWorld2
ECDescription1=Implementation of HelloWorld2 within Autodesk Revit

Any ideas?

[scowsert]

Are you using the same dll file? I've been able to use the same dll on 32bit and 64bit.

[nayche]

Try using a different dll
also, make sure you're not debuging the 32-bit dll on a 64-bit Revit, this might cause issues too.

Regards,

[fwp]

Which dll are we referring to, RevitAPI.dll or mine? The project is set to not copy the API local as suggested in the documentation. My dll is compiled for "AnyCPU". Is there any way to tell why Revit will not load the Add-In if no error is given? Logs, etc.

[Danny Polkinhorn]

If there is a duplicate "[External Commands]" section in your INI file, it will ignore the second one. Otherwise, you should get some sort of error in 2010 if your application doesn't load properly. The other thing I noticed is that your dll is not in the Revit application directory which is recommended but not required in your case.

HTH,

[fwp]

Move it to the Revit program directory and it worked. Not sure why, I'll play more later. Thanks to all.

Frank

[Danny Polkinhorn]

Hmm, maybe it is required in your case.

[Ning Zhou]

doesn't work if i put dll in the folder of networked drive and set to trusted zone, so i have to copy dll to each user's local drive, maybe i missed something, if not, then is there any workaround?

[Danny Polkinhorn]

There many reasons why it might not be working. There are also several reasons why you should put your dll in the Program directory. There are a variety of ways to copy it locally and they're usually easier than trying to figure out why it's not loading from the network. Once your copy routine is set up, you should be good to go. Not to mention that Autodesk recommends you put it in the Program directory as well.

Hope that helps,