Sir/Madam,
I am a graduate student in Petroleum Engineering. I have a problem in using
R and hope that you could help in solving that. I have a code in C, which
displays orthogonal arrays when I give number of rows and number of columns
to it. I have another code in R that calls this C code. I am very new to R.
I downloaded the R and loaded packages base and mva. I also kept my C code
.exe file in the R\rw1070 directory and used the function that is written in
R. There is some problem in this line it seems:
if(!is.loaded(C.symbol("woa"))) dyn.load(woa.obj) # woa is my file name
in C
Error message coming like this:
Error in dyn.load(x, as.logical(local), as.logical(now)) :
unable to load shared library "C:/Program Files/R/rw1070/woa.so":
LoadLibrary failure: The specified module could not be found
I tried to get help from help files but I couldn’t get the problem solved.
Its very important for me to fix this problem as fast as possible and hope
you could help me in this regard.
Thank You
Sincerely,
Kalla
Query about C Function Interface
3 messages · 70808subhash kalla, Brian Ripley, Duncan Murdoch
You are trying to load woa.obj, and you are on Windows which should be looking for a .dll and the error message says woa.so. You say you keep your .exe in the rw1070 directory. You are rather confused! dyn.load on Windows loads a DLL file from the current working directory, *as its help says*. You need to build a suitable DLL.
On Thu, 5 Jun 2003, 70808subhash kalla wrote:
Sir/Madam,
I am a graduate student in Petroleum Engineering. I have a problem in using
R and hope that you could help in solving that. I have a code in C, which
displays orthogonal arrays when I give number of rows and number of columns
to it. I have another code in R that calls this C code. I am very new to R.
I downloaded the R and loaded packages base and mva. I also kept my C code
.exe file in the R\rw1070 directory and used the function that is written in
R. There is some problem in this line it seems:
if(!is.loaded(C.symbol("woa"))) dyn.load(woa.obj) # woa is my file name
in C
Error message coming like this:
Error in dyn.load(x, as.logical(local), as.logical(now)) :
unable to load shared library "C:/Program Files/R/rw1070/woa.so":
LoadLibrary failure: The specified module could not be found
I tried to get help from help files but I couldn?t get the problem solved.
Its very important for me to fix this problem as fast as possible and hope
you could help me in this regard.
Perhaps you should be paying a consultant to help you, then?
Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595
On Thu, 05 Jun 2003 23:50:07 -0500, you wrote:
if(!is.loaded(C.symbol("woa"))) dyn.load(woa.obj) # woa is my file name
in C
Error message coming like this:
Error in dyn.load(x, as.logical(local), as.logical(now)) :
unable to load shared library "C:/Program Files/R/rw1070/woa.so":
LoadLibrary failure: The specified module could not be found
This message indicates that you set your filename to "woa.so", which doesn't make sense in a Windows context. As Brian Ripley said, you need to make a DLL. There are some instructions on making DLLs in the readme.packages help file; more are on my web page <http://www.stats.uwo.ca/faculty/murdoch/software/compilingDLLs/> Duncan Murdoch