Installing D:\cpanrun\build\5-6-1\site\lib\UDPM.pm Writing d:\cpanrun\build\5-6-1\site\lib\auto\UDPM\.packlist Appending installation info to d:\cpanrun\build\5-6-1\lib/perllocal.pod rc/Ut\1....... Run optional ASCII Interface tesok, 30/31 skipped: ASCII Interface test suite bypassed. All tests successful, 30 subtests skipped. Files=2, Tests=209, 2 wallclock secs ( 0.00 cusr + 0.00 csys = 0.00 CPU) d as a "" or a 0, but maybe it was a mistake. To suppress this warning assign a defined value to your variables. To help you figure out what was undefined, perl tells you what operation you used the undefined value in. Note, however, that perl optimizes your program and the operation displayed in the warning may not necessarily appear literally in your program. For example, "that $foo" is usually optimized into "that " . $foo, and the warning will refer to the concatenation (.) operator, even though there is no . in your program. Use of uninitialized value in pattern match (m//) at t\2.t line 18 (#1)