Line 51 of your Parser module attempts to call an undefined subroutine class. You didn't show that piece of code, but it's almost certainly wrong.

This error message is likely due to the use of AutoLoader somewhere, which installs an AUTOLOAD() subroutine to catch calls to undefined functions. It then attempts to load the files containing those subroutines. There's no really good reason to do this normally.

In reply to Re: An error in using XS by chromatic
in thread An error in using XS by Anonymous Monk

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