Hello Robert,Pedro and NicC thanks for addressing the post.
Robert: Yes it was a RECFM 'U' and so i was not able to edit or view it. What i mean by sensitive dataset is that it was a system load modules say the linklibs. And i didnt try all the Load library (user library) hence i thought because of system sensitive load module its getting opened as Default Browse.
Pedro: Thanks for the codes. That could help me in my implementations.
NicC: I didnt get any error code. Rather it was displaying "Browse substituted" Now i can understand the reason for that. Thanks all for educating me!