I'm trying to run one of my work project in IAR IDE and it seems he compile all the files (i can see it in the build window) but never reach the Linking phase and the post-build action. (There is no line indicate he done anything). In my boss PC it work 100% and preform all the require operations and no one know why... we are using IAR 4.41A (and we are not allowed to upgrade)
I would inspect what the compiler/... is actually doing under the hood:
I use a newer (but similarly outdated) v7 IAR, and in that you can tell the IDE to print more output about what it is doing -- compiler flags being used etc.
In v7, you go to Tools->Options->Messages and select "Show Build Messages: All". In that same window you can also define a .log file where that output is dumped, so you can inspect it more conveniently than in the IDE console window.
I suspect IAR v4 will have a similar setting?