Hello, I've tested the "grep -P" option on a model output of 10 GB. The output consists of multi-line records, and I've used several variations of similar type commands:
Grep -P "(?s)FIRES\-.*?;" filename Grep -P "(?s)\-INTERCEPTS.*?;" filename Grep -P "(?s)FIRES\-.*?(?=\n \d)" filename In all cases, comparison with the results from doing single-line grep command: Grep FIRES\- filename Grep \-INTERCEPTS filename Grep FIRES\- filename Reveal dropping of a small percentage of output incidents that should have been matched. Examination of the file showed nothing unusual with the dropped entries that would cause them to fail. Because of this bug, the grep -P command cannot be used for accurate tabulations. Has anyone reported such a bug? Has it been corrected in later versions? The grep -V command displays: GNU grep 2.5.1 Michael Souchick
