Your module defines a subroutine with the same name as a core function, which causes ambiguity. To get rid of the error you need to do what the message tells, you call CORE::open() instead of just open() so that perl doesn't have to guess if you mean CORE::open() or Logger::Simple::open().

In reply to Re: File locking with semaphores by jasonk
in thread File locking with semaphores by TStanley

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