I am currently using a 64bit installation of 2010a on Windows 7. There are some incompatibility issues with the 64bit version for another program i am using and so need to use the 32bit version of Matlab. Is it possible to install the 32bit and 64bit versions on the same machine for either 2010a or 2010b or will i just have to remove the 64bit version?
Also, i read somewhere that when installing the 32bit version it shouldn't be placed in the 'Program Files (x86)' folder as it doesn't like special characters. Is this correct?
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Yes, it is possible. I have both the 32-bit and 64-bit installation of MATLAB on my machine, running Windows 7 64-bit. And yes, I would highly recommend installing the 32-bit in a different directory (I believe the problem is with the parentheses in the path). My 32-bit MATLAB is installed in C:\MATLAB_32bit.
To launch the 32-bit installer, you need to navigate on your installation DVD to bin\win32 and run the setup.exe file in there.
If you have both a 32-bit and 64-bit installation of MATLAB on the same machine, be aware that they share the same preference directory. This means, amongst other things, that when you switch from using one to using the other, you need to run mex -setup to set up the correct compiler (32-bit vs. 64-bit).
FYI for anyone using the downloaded installers (not the DVD) --
If the 64-bit installer is located in the same directory as the 32-bit version, the 32-bit installer will install the 64-bit version instead.
To correct this, it is necessary to locate the 32-bit and 64-bit install files in separate folders; then the 32-bit installer will install the 32-bit version of MATLAB.