Access is denied, SDK Error Loading Library

2018 9 4
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更新时间：2018 9 6
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I am having an issue loading a library to MATLAB. I think it is because SDK is not installed right. When I type mex -setup I get the following: MEX configured to use 'Microsoft Windows SDK 7.1 (C)' for C language compilation. Warning: The MATLAB C and Fortran API has changed to support MATLAB variables with more than 2^32-1 elements. In the near future you will be required to update your code to utilize the new API. You can find more information about this at: http://www.mathworks.com/help/matlab/matlab_external/upgrading-mex-files-to-use-64-bit-api.html.
I do not understand this. What does it mean and how do I fix it? Thanks, S.

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Walter Roberson
Walter Roberson 2018-9-4

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That is not an error. SDK 7.1 is selected. The rest is a warning for people who are trying to compile code that was written in the time when mex only supported 32 bit memory, that code from that era will have to be updated. R14SP3 from September 2005 was the first release that supported 64 bits, so this is a warning for people dealing with code a dozen years old.

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Sarah Crimi
Sarah Crimi 2018-9-5
I then get this error afterwards: Access is denied. ******* Error using loadlibrary The MATLAB program file describing your library could not be found, possible Perl or file system error.
Error in FTD2XX_SPI_libMPSSE (line 62) loadlibrary( Libname, 'libMPSSE_spi_matlabFriendly.h');
Walter Roberson
Walter Roberson 2018-9-5
That could happen if you do not have write access to the directory you are cd'd to when you call loadlibrary() -- or possibly it tries to write in a directory whose name you can find by running
tempdir()
Sarah Crimi
Sarah Crimi 2018-9-6
Hello, Thanks for your help. I found that my Sophos Endpoint antivirus software was blocking the Active Perl. You steered me in the right direction. :)
Sarah Crimi
Sarah Crimi 2018-9-6
Hello, thanks for the help. It ended up being an issue with the virus software, Sophos Endpoint. It was blocking me from using ActivePerl.

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