[R] problems using the thin plate spline method

[Mintewab Bezabih]

Dear R users, 

I am a beginner in R trying to apply the thin plate spline method to my climate data. I used the example in R to do so, and the lines seem to run fine ( I am not getting errors) but I am not getting any output in the form of graph or anything. I got a warning message saying that 'surface extends beyond box'. 

Any help is much appreciated. 
thanks 
minti