xpose4 - Individual plot

[jeslo328]

Why is my individual plots provide the below error
ind.plots(xpdb,subset="DOSER==0.25")

Error in Summary.factor(c(1L, 2L, 3L, 4L, 5L, 6L, 13L, 14L, 15L, 16L, :
‘max’ not meaningful for factors

run.number <- "730d2" # Define the run.number is ......
xpdb <- xpose.data(run.number) # Object of the data

change.xvardef(xpdb,var="idv") <- "NTPTN"
change.xvardef(xpdb,var="dv") <- "NAVAL"
change.xvardef(xpdb,var="id") <- "UID"

ind.plots(xpdb,subset="DOSER==0.5",logy=T)

xpdb730d2.csv