rsaga.geoprocessor("imagery",obia, list( FEATURES=memory,
                                        NORMALIZE=1,
                                       OBJECTS=NULL,
                                       SEEDS_BAND_WIDTH=2,
                                       MAJORITY_RADIUS=1,
                                       POSTPROCESSING=1))

Error in if (!is.na(env$cores) & (substr(env$version, 1, 4) == "2.0.")) { :
argument is of length zero
In addition: Warning messages:
1: In rsaga.env() :
SAGA command line program 'saga_cmd.exe' not found in any of the following paths
C:/Users/NAME/Documents/R/win-library/3.3/RSAGA/saga_vc
C:/Users/NAME/Documents/R/win-library/3.3/RSAGA/SAGA-GIS