On 22/02/2016 10:24 AM, MAURICE Jean - externe wrote:
Hi,
With this piece of code, I get the message 824 :
deelel <- paste(AccesDLL, "/regr.dll",sep="")
if ( ! is.loaded(deelel))
The is.loaded function checks for symbols, not libraries. See
?is.loaded for examples.
{
dyn.load(deelel)
if ( ! is.loaded(deelel))
{
cat("824 : ", deelel, "non charg�e\n")
}
}
Am I doing something wrong in this code ?
If not, what can prevent a DLL to be loaded ? And first is it a problem if the
DLL is has been built on a 32bits Windows system and is used on a 64bits
windows system ?
It doesn't necessarily matter where it was built, but it definitely does
matter what the target architecture is. If you are running 32 bit R,
you'll see "Platform: i386-w64-mingw32/i386 (32-bit)" in the startup
banner, and you need a 32 bit DLL. If you are running 64 bit R, you'll
see "Platform: x86_64-w64-mingw32/x64 (64-bit)", and you need a 64 bit
DLL. 32 bit Windows can only run 32 bit R, but 64 bit Windows can run
either architecture.
Duncan Murdoch
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