Sometimes 'mex -setup' does not list the installed compilers although compiler is installed in the system. This issue is very sporadic in nature and occurs when is no.xml(e.g. MexCwin64.xml for mingw) file present at 'C:UsersAppDataRoamingMathWorksMATLAB' location. Un-installation of all the instances of Microsoft visual studio and Microsoft C redistributables from the system and then installing Microsoft SDK 7.1 in administrator mode does not help here.
I had the same problem. To be specific, I got the '. Is incomplete.'
Error when I chose the SDK, and 'SDK is not installed.' Error when I chose the MSVC compiler. I dug in pretty deep till I realized that the problem was that I had installed the SDK to a different drive. And some components of the SDK have to be in the boot drive. So when the path of the SDK was queried for in the registry (HKLMSoftwareMicrosoftMicrosoft SDKsWindowsv7.1InstallationFolder), it contained the C: path.
But that path, consisting of only compulsorily-on-c-drive components, did not have the rest of the executables. Hi, when encountering problems probably related to the.net framework version issue, I ran into trouble with getting the SDK 7.1 installation right in the reinstallation process. It turned out the source of the trouble was 'Microsoft Visual C Compilers 2010 Standard - enu - x64'.
Install Windows Platform Sdk
The sdk installer detected that it was installed, but claimed it would not need to be uninstalled, which in my case turned out not to be true. When installation of the SDK was complete Matlab gave the following message.