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Rephrasing what ikegami said already:

the output of `unix_tool file_name` is probably _empty_.

What if you run this very command in the shell?
What if you use the full path to unix_tool inside the backticks, if unix_tool isn't in the current directory?

Maybe these questions can help you in tracking the problem down.

Update: what if you dump out $var after filling it, like

use Data::Dumper;
print Dumper( $var );

Altough this sounds improbable, maybe you just falled over some bug, maybe one that appears only within your environment: what Perl do you use, on what OS?


Krambambuli
---

In reply to Re: Extract paragraph from multi line string by Krambambuli
in thread Extract paragraph from multi line string by yanirdz

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