Subj : Re: unresolved error with FITS To : borland.public.cpp.borlandcpp From : "Ed Mulroy [TeamB]" Date : Wed Oct 08 2003 10:27 am I think you are correct in your assumtion. The header file only provides function templates for the functions to be used. An actual library or DLL is what supplies the code for those functions. If the FITS library is a DLL. Locate the DllName.LIB file If there is no such file or if there are complaints about it when you later try to build the program you can create a new one with a command like this one: implib -c DllName.LIB DllName.DLL where the command is executed when the default directory is the project directory Else locate the LIB file Go to the project window Highlight the EXE name by clicking on it Press the Insert key A file selection dialog will open, select the *.LIB file Now do a Project|Make If you do know where the library or DLL for the FITS library is then you will not be able to build the program until you locate it. .. Ed > Alan Giltinan wrote in message > news:3f84086e@newsgroups.borland.com... > > Hi all, > I have a problem which keeps occuring when i try to build my program. > First, the program is used for reading a particular image file called FITS. > The 'fitsio.h' file is included without a problem and compiling is no > problem. > However when i try to build, the following error occurs, > "Error: Error: Unresolved external '_ffopen' referenced from > D:\CFITSIO\CEXAMPLES\TEST_FITS.OBJ" > I suspect it is because i do not have a .lib or .dll file specified > correctly but i do not know how to do this. > > Can anyone help please? > thanks .