Sorry to kind of repeat this but I really didn't understand the issues with the prior thread and how it relates to my issue.
I'm getting the error message in B_T <- BT(Temp) Error in BT(Temp) : DLL requires the use of native symbols Execution halted And frankly, I have no idea what this means. The function call is pretty simple and meets the requirement of .Fortran res <- .Fortran('BT', as.double(Temp), as.double(y), as.integer(icode)) and the following matches the R-ext's method for using registration: extern void F77_NAME(bt)(double *T, double *B, int *icode); void R_init_IAPWS95(DllInfo *dll) { R_registerRoutines(dll, NULL, NULL, FortranEntries, NULL); R_useDynamicSymbols(dll, FALSE); R_forceSymbols(dll, TRUE); } With static const R_FortranMethodDef FortranEntries[] = { {"bt", (DL_FUNC) &F77_NAME(bt), 3}, {NULL, NULL, 0} }; Furthermore the NAMESPACE includes: useDynLib(splines, .registration = TRUE, .fixes = "C_") which matches R-ext. Since this is only occurring on the Linux versions for the software and I use windows, can someone point me in the right direction to fix this error? Shawn Way [[alternative HTML version deleted]] ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel