how to solve error in R if the entire function (GRTS) shows as unused arguments?

Question

I am trying to use the GRTS function and I can't figure out the source of the error that makes it seems like the entire function is unusable.

 test.design <- list( "Deep Lake Fen"=list(panel=c(PanelOne=3), seltype="Equal", over=0))

 grts(design= test.design,       #the GRTS call will reference the Stratdsgn object
 src.frame="shapefile",   #the sample frame is coming from a shapefile
 in.shape ="Leon33_FenCenter",           #the shapefile used is XXXX.shp
 att.frame=att,           #attribute data frame
 type.frame="area",       #type - area vs linear
 DesignID = "STRATIFIED",   #name for the design
 shapefile = TRUE,        # the output- a shapefile
 prj="Leon33_FenCenter",                 #projection to use for the shapefile - same as listed file
 stratum = "Name",            #name of the column containing stratum in .dbf
 #mdcaty = "Stratum",             #name of columnn that identifies the unequal probability category for each element
 out.shape="Leon33_FenCenter_GRTS")      #name of the output shapefile 

This is the resulting error I get when I try to run the above code: Error in grts(design = test.design, src.frame = "shapefile", in.shape = "Leon33_FenCenter", : unused arguments (design = test.design, src.frame = "shapefile", in.shape = "Leon33_FenCenter", att.frame = att, type.frame = "area", shapefile = TRUE, prj = "Leon33_FenCenter", out.shape = "Leon33_FenCenter_GRTS")

Can anyone help determine the source of the error and how to fix it?