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/usr/lib/nagios/plugins# ./check_mtr -H 94.x.y.z ./check_mtr:54:in `run_mtr’: undefined method `captures’ for nil:NilClass (NoMethodError) from ./check_mtr:50:in `each’ from ./check_mtr:50:in `run_mtr’ from ./check_mtr:11:in `initialize’ from ./check_mtr:136:in `new’ from ./check_mtr:136
there is a bug in the script. i ran it under latest ubuntu after installing ruby.