hI I am having a big file having content of file like this pin (PIN1) { direction : input ; capacitance : 0.016700 ; max_transition : 0.4000 ; } pin (PIN1) { direction : input ; clock : true ; capacitance : 0.016700 ; max_transition : 0.4000 ; timing () { timing_type : min_pulse_width ; related_pin : "RXAUPTSTART" ; fall_constraint (pulse_width_template_2x1) { index_1 ("0.0010, 0.5000") ; values ("20, 20") ; } rise_constraint (pulse_width_template_2x1) { index_1 ("0.0010, 0.5000") ; values ("20, 20") ; } } } I need to search the pattern P1 and delete the first block , it should not touch the second Block So the rest of the file content will be : pin (PIN1) { direction : input ; clock : true ; capacitance : 0.016700 ; max_transition : 0.4000 ; timing () { timing_type : min_pulse_width ; related_pin : "RXAUPTSTART" ; fall_constraint (pulse_width_template_2x1) { index_1 ("0.0010, 0.5000") ; values ("20, 20") ; } rise_constraint (pulse_width_template_2x1) { index_1 ("0.0010, 0.5000") ; values ("20, 20") ; } } } Hi I have written a awk script like this awk '/PIN1/{c==4};--c<0' file But it is deleting the content from second Block also Thanks neha