Hi, >From what you say, you appear to be using a Visual Studio build for GSL. When you built GSL, did you also build and run all the GSL tests?
If these tests pass, it is possible that the problem lies in the way the GSL library is linked into your fortran90 code. Have you checked that the compiler that built the Fortran program and that used to provide GSL operate with compatible library and binary formats? The Intel C++ and Fortran compilers on Windows are compatible and can be used for mixed language development. But I am not sure about mixing a library produced with the Microsoft compiler with code produced by non Microsoft compilers. I have heard that this works but I also know of situations where this has produced failures. Brian Gladman
