How to exec cfg files mac

OK so on PC i just do exec file.cfg but on my mac, i put a cfg in the same folder as redeclipse.app and i exec'd it and it said it couldn't read. what do i do?
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UD98 {l Wrote}:OK so on PC i just do exec file.cfg but on my mac, i put a cfg in the same folder as redeclipse.app and i exec'd it and it said it couldn't read. what do i do?