Hi, welcome to the monastery.

Somewhere in your program you have a concatenation, which means to join two things together. It may look like this:

print 'value = ' . $value;
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or

print "value = $value";
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. . . or similar.

If $value is "uninitialized" Perl will spit out this error (but only if you have warnings enabled -- you do; good job, otherwise your script would be failing silently!)

So you should always check to see that what you are attempting to concatenate, actually exists:

if ($value) {
  print "value = " . $value;
} else {
  print 'Yikes! No value for $value.';
}
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