Error reading opoly.asc

[Mallikarjun]

Hello Grads Users,

 I have a data over land and Ocean. But I need to display
only over land and need to mask ocean data. I got to know
that basemap.gs would do this job. But when I run this
it is giving an error reading from opoly.asc

I am using 1.9 beta version. I have even tried in 1.8 verision
also. Same error.

Could anyone please suggest me how to about it.

Thanking you,
--
Mallikarjuna.K