Isn't Cinema 4D supposed to determine  32bit 64bit upon install ?

No. It installs both 32- and 64-bit versions in the same place. You can then choose which one you run (because some plugins, for example, don't run in 64-bit). You should have two executables, such as Cinema 4D.exe and Cinema 4D 64bit.exe (the exact names vary slightly between releases for some reason).

NB this is on Windows. On the Mac I think some versions start in 32-bit mode, others in 64-bit, depending on the version of OSX and the release of C4D.

Thanks a million,

-Paul

I think Microsoft confused the hell out of everyone with the two program files directories from Vista onwards. Logically, I suppose, 32-bit apps go in the program files (x86) folder, 64-bit in the ordinary program files folder, but not every installer pays attention to that. You end up with a daft situation where either 32- and 64-bit versions are in the same place, like Cinema, or a double installation taking up twice the disk space, like Photoshop.

Just to confuse you even more, R11.5 installs both 32- and 64-bit versions into the plain program files (not the x86) folder!

**Well, they got me confused.

Really makes me feel stupid sometimes :P
**

It's a lot less confusing if you simply install Cinema in the root of your windows drive (ex. C:MAXON.....)  I personally dislike installing programs outside the program files directory, but it's the best way I've found to get both x86 and x64 versions of Cinema to work.  Hope this helps, DPK

I have an i7 Cinema r11, and Cinema Runs great. I also unfortunitly haven't upgraded to Windows 7, still with Vista. I don't know how I originaly set it up. But it is running with 64.

i have an i7 running windows 7 32 bit and c4d 11.5 runs fine. I have vista 64 bit on another drive and that works fine too albeit with limited plugins. I have yet to see if everything is fine using windows 7 64 bit