Thanks zazzybob and Ygor for your help. But I see some problem with each of your scripts.

zazzybob's script - First of all I have a fixed length data file that I need to split. The script creates seperate files with the intended data but it ignores the spaces in the fields, means it concatenates the fields leaving out the spaces in them.

Ygor's script - Your script creates only one file named DOC with the data between the last DOC/END. But it puts the data like what it is in the input file, that is a good sign.