I just installed a Windows 7 64-bit PC in my lab for use with my various PNA's and PNA-X's. My existing scripts use Matlab and DCOM to remotely control the analyzers. 32-bit Matlab with pnaproxy.exe does work on Windows 7 64-bit. However pnaproxy.exe doesn't work with 64-bit Matlab. Is there a 64-bit version of pnaproxy.exe?