Dear list, I am using AsciiGridPredict from the yaImpute package to make a spatial prediction of a randomForest model. When I call AsciiGirdPredict I am getting an error message, that I do not understand: AsciiGridPredict(st.rf.fit, xlist, ylist, xtypes=NULL, rows=NULL, myPredFunc=NULL) Rows per dot: 8 Rows to do: 884 ToDo: .............................................................................................................. Done: Error in unionDataJoin(m1, m2) : row names are requried within all input matrices In addition: Warning message: In AsciiGridImpute(object, xfiles, outfiles, xtypes = xtypes, lon = lon, : NA's generated due to illegal level(s). Does someone know what the error means and how I can solve this problem? Thank you very much in advance, Frauke _________________________________________________________________ Show them the way! Add maps and directions to your party invites. [[alternative HTML version deleted]]