[R-sig-Geo] Error in bbox(newdata) : object not a >= 2-column array

[philipova at imbm.bas.bg]

Dear R-Users,
Please anyone to help me with this error:

kriged=krige(Nmin~1,locationsDD,grid,model=vgm(1,"Exp",150,1))
Error in bbox(newdata) : object not a >= 2-column array

Thank you so much in advance!
Kind Regards
Nina Philipova
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