Where did the code come from? I presume (given the level of your questions) that this is not your own code. There are some rather unusual aspects to the code and if you are not a reasonably competent Perl programmer I suspect you will continue to have trouble with it.

For a start while () {...} is an unterminated loop, which is unlikely to be correct given that there is code following it.

The match giving you your immediate trouble is against the default variable ($_), but nothing assigns a value to it, hence it is uninitialized (the immediate error). But it is not at all clear what value should be assigned to it.

Perl is environmentally friendly - it saves trees

In reply to Re^3: search pattern not terminated by GrandFather
in thread search pattern not terminated by habel_k

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