Suppose you have one CNV containg 4 reads of 120 bp each, see below:

start.p     end.p     type       nexons   start      end        chromosome   id
745         748       deletion   4        33195196   33195367   chr7         7:33195196-33195367

• start p. determines the number of the first line where the above CNV starts
• end. p determines the number of the line where the above CNV ends.

These lines can be found in your bed.frame.

745: 7    33195195     33195314     7:33195195-33195314
7         33195196     33195315     7:33195196-33195315
7         33195247     33195366     7:33195247-33195366
748: 7    33195248     33195367     7:33195248-33195367

Hope it helps

KIZ