Hi Tom, Thanks for your reply. I tried setting up a new file type , using File Mappings in the target settings panel. This allowed the IDE to recognise the tcl84.lib (windows file) but I could not compile the file. I can also add the linux lib84.a file and compile but when linking it reported that it could not understand the lib84.a file. As Codewarrior is relatively new to me and I have had no problems integrating tcl and c in Visual C++, can you tell me how to integrate tcl into a CodeWarrior C application ? The aim being that I can monitor an application , using Tcl/tk in Windows, whilst executing using the QUICCstart MPC8248 Evaluation system. Regards, Nitor