How to load custom dll in R

Question

When running a R script in a windows console using a custom DLL , I get the error "can't load shared object path\\dllname".

But the DLL is exactly in this location. Further, using the R gui, I can execute the script.

Where is R looking for DLLs ?

My call is:

dyn.load(paste("myrdll", .Platform$dynlib.ext, sep=""))

The DLL is located in the same folder as the script and in addition in the appropriate system folder. What is R expecting in addition?

Thank you

Answer 1

R cannot load arbitrary DLLs. It can only load those created by compiling and linking the source files using R CMD SHLIB . See the ?utils::SHLIB help page.

Answer 2

I am sorry to confuse the forum: I was trying to load a 32 bit R Wrapper DLL in a 64 bit console. I was thinking the default CMD window on Win 10 64 bit is still 32 bit. So the problem is caused by architecture mismatch.