ploting monthly anomalies

[Marcelo Barreiro <marcelo@xxxxxxxxxxxxxx>]

Hi!

I calculated monthly anomalies following the explanation about it in
the FAQ section.  
Being Prec my variable I typed:

? define grid/like=Prec Precgrid
? use climatological_axes
? cancel data climatological_axes
? let Prec_clim=Prec[d=1,gt=month_reg@mod]
? Prec_clim=Prec_clim[gt=Precgrid@asn]

and then to plot the result I tried:

? fill/l=1 Prec_clim

and received the error message:

**ERROR: stack overflow
***NOTE: Check for recursion in variable definitions

So, I guess I am not ploting correctly the results. 
How should I plot?

Thanks for any help.

Marcelo