Loop from List in Geospatial Modeling Environment

Does anyone know how to loop in GME using a list of text values.  I am trying
to create home ranges for each animal in a point shapefile of locations. 
Here is an example of the Command Text I am trying to use:

l<-'SGF4037', 'SGF4244';

for (i in ls()){
kde(in=paste("SGF.shp"), out=paste(i,"_SGF.img"), bandwidth="CVh",
cellsize=50, where=paste(?BAND=",ls()));
};

"l" is my list attributes in the "BAND" field.



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