[GRASSLIST:2839] gstat: value not allowed for: data v field not found in sites list

[Kinberger Michaela]

Im trying to make geostatistics with gstat/GRASS. There are some 
examples in the GRASS book from Mitasova and Neteler.
I´m using the Maas UTM Location like in the example, but I always get 
back the same error:

GRASS site list werte: 0 cat, 2 dim, 0 str, 1 dbl.
Warning: gstat/grass doubles in site list are ignored, check data v field!
*gstat: value not allowed for: data v field not found in sites list
*
I´m using GRASS 5.0.r binaries and gstat version 2.4.3 with libraries:  
gd (png) grass ncurses

What can I do to get a result.

Thanks
michaela

-- 
Institut fuer Geographie und Regionalforschung
Universitaet Wien
Kartografie und Geoinformation

Departement of Geography and Regional Research
University of Vienna
Cartography and GIS

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