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First of all you will get better help if you use a subject line that briefly describes your issue. Every post on this board is about LabVIEW.
Next, your description is a bit cryptic - it's hard to understand whether this is a Matlab issue or a LabVIEW issue. You spend most of your time describing issues with compiling Matlab code into DLLs and then indicate that those DLLs cause an error in LabVIEW. You also do not include any code, making it difficult to help you to troubleshoot.