From: Vandana Date: 2008-10-28T05:39:33+09:00 Subject: file manipulation Hi All, I have one more question with file manipulation. Suppose I have the following structure in a file : --------------------- Instance J1 ( net n1() net n2 () net n3() ) Instance J2 ( net n1() net n2() net n3() ) Instance J3 ( net n1() net n2() net n3() ) ----------------------- As an example, I want to read J3/net n3. (the files are huge ....in GB) I can grep for n3 but it will return 3 instances of n3. How can I ensure that Im reading n3 values that belong to instance J3? Thank you for your time. I really appreciate your help. Thanks Vandana.