I've built a model which interpolates series of data by IDW method and it works well. But when I tried to change method of interpolation to kriging I encountered some problems with using Z value field as a variable.
Here are some pictures that may help to explain my problem:
how the data look like: http://imageshack.us/a/img22/4167/l4th.jpg
IDW version: http://imageshack.us/a/img221/1879/qegc.png
I'm using 'For' iterator and variable for Z value field 'a%Value%' so every iteration is using next data field as Z values. And values of the iterator are preconditions to interpolation. It's is basically the same model in both versions but I don't know why the variable isn't working with kriging. When I open the Kriging tool I've got this error in Z value field:
ERROR 001000 Z value field: Field a%Value% does not exist
but in the IDW version it works well. Any ideas?