I would really like an answer to your question. I cannot het my executables to run on a Win XP machine either. I should add the qualifier - If the machine does not have MatLab installed, it runs fine. If the machine does have MatLab (as is required to run the scripts), then it hangs up. The vis run very well, it is just the executables that have problems. I have replaced all the DLLs that they talk about, and posted my own question about this problem. Please help!