grass4.1/3d.view.sh

Hello,
I do not have any problem in running slide.show.sh.

But, when I run 3d.view.sh (with spearfish data)
I am getting the following message.
GRASS 4.1 > 3d.view.sh
MAP: elevation
EXAG: 3
EF: elevation
FH: 30000
ERROR: Raster map [elevation] not available
ERROR: Map: [elevation] not found
ERROR: Map: [elevation] not found
ERROR: Map: [elevation] not found

Thanks in anticipation

Thiru

N.Thirugnanasothy Tel. No. 0274 383323
Computer Centre, Fax. No. 0274 304354
University Of Bradford,
Richmond Road,
Bradford, West Yorks.,
BD7 1DP., UK