无法使用dyn.load Windows 7 64bit在R中加载dll文件

Question

Although similar questions have been asked I can't seem to find the answer to mine. I need to include C++ code into R to speed up my algorithm. After my first attempts of understanding how it works failed, I am following this tutorial . I use dev C++ which should have the right compiler gcc(I learned that I should not be using virtual C++) and have succesfully created the .dll file that he is talking about in 1.3.2. However when i try loading it in R (64bit) I get the error message

Error in inDL(x, as.logical(local), as.logical(now), ...) : unable to load shared object 'C:/Rpackages/Test/src/Xdemo.dll': LoadLibrary failure: %1 is not a valid Win32 application.

I learned from other posts that this could due to the fact that in my path there is some calling to 32bit applications. However I removed these, but still get the same error. My path:

C:\\Program Files\\R\\R-2.14.1\\bin;C:\\Rtools\\bin;C:\\Rtools\\MinGW\\bin;C:\\Perl64\\site\\bin;C:\\Perl64\\bin;C:\\Program Files (x86)\\MiKTeX 2.9\\miktex\\bin;C:\\Program Files (x86)\\HTML Help Workshop;C:\\Program Files\\Common Files\\Microsoft Shared\\Windows Live;C:\\Program Files (x86)\\Common Files\\Microsoft Shared\\Windows Live;C:\\Program Files\\Intel\\WiFi\\bin\\;C:\\Program Files\\Common Files\\Intel\\WirelessCommon\\;c:\\Program Files\\WIDCOMM\\Bluetooth Software\\;c:\\Program Files\\WIDCOMM\\Bluetooth Software\\syswow64;c:\\Program Files (x86)\\Common Files\\Roxio Shared\\DLLShared\\;C:\\Program Files (x86)\\Windows Live\\Shared;C:\\Program Files (x86)\\QuickTime\\QTSystem\\;C:\\Users\\anne\\AppData\\Local\\Smartbar\\Application\\;C:\\Users\\anne\\AppData\\Local\\Smartbar\\Application\\

Some help would be really appreciated!

Answer 1

When I use 64bit R, the path is under ...R\\R-'version'\\bin\\x64 (instead of \\bin) and the problem goes away.

Try to use R --version to confirm.