[gradsusr] multiplication in Grads script

[Kathryn Sellwood - NOAA Affiliate]

I have defined 2 variables in a grads script which I would then like to
multiply
to obtain a 3rd variable
xdif=1.12
xplot=0.047
xdist=xplot*xdif
I get the following error "Non-numeric args to numeric operation"
I have tried multiple ways to get this to work with no success ... guessing
that it is commenting out "xdif" but I also tried putting * in quotes and
that produced a similar error.
Any Ideas?
Thanks!
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