[gradsusr] error message opening plotting on grads on pc machine

[Shing]

dear all,

recently i installed grads on  a pc with win xp. as i was trying to plot the
data (simple contour), got the error message that says

"Open Error on Map Data Set: /usr/local/lib/grads/lowres
Cannot contour grid - all undefined values
Error opening stroke character data set
Data set names = /usr/local/lib/grads/font0.dat ; font0.dat"

i remember dealing with this problem before: it has something to do with
setting the right path for the map and font files, but i forgot how i went
about it before =(

would someone please kindly instruct me? thank you very much ^_^

shing
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