mclmcrrt77.dll missing after installing Windows 7?

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Cathy 2011-6-9

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https://ww2.mathworks.cn/matlabcentral/answers/9184-mclmcrrt77-dll-missing-after-installing-windows-7

回答： hervineau sebastien 2016-9-19

After OS upgrade to Windows 7 from XP, my .exe stopped working. The error message says: "The program can't start because mclmcrrt77.dll is missing from your computer. Try reinstalling the program to fix this progblem."

I tried to rerun MCRInstall.exe but it didn't help. (MCR v7.7)

Please help~

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Answer 1

Walter Roberson 2011-6-9

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https://ww2.mathworks.cn/matlabcentral/answers/9184-mclmcrrt77-dll-missing-after-installing-windows-7#answer_12648

Possibly a PATH problem. See this solution

Question: did you go from 32 bit to 64 bit? If so then you will need a different MCR, I believe.

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Cathy 2011-6-9

I think this might be the exact problem! I found I am upgraded to 64 bit. Do you know where to download the 64-bit MCR? thanks a lot!!

Kaustubha Govind 2011-6-10

You will need to have the person who compiled the application to provide you with the 64-bit version of the MCR (it is included with a 64-bit installation of MATLAB Compiler). The MCR cannot be placed for public download for licensing reasons.

However, note that users have been able to have 32-bit MCR running on 64-bit Windows in the past - see http://www.mathworks.com/support/solutions/en/data/1-3PKX8O/index.html

I think the real reason in your case is that $mcr_root\ver\runtime\win32 has not been added to your system path. I find that on Windows 7, if you don't run installers as Administrator, it doesn't not give them privileges to perform operations like modifying the system path.

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