tcplPlot error for obscure well types

[madison-feshuk]

Getting the following error trying to plot:
Error in data$dsstox_substance_id <- paste0("Well type: ", wllt) :
object of type 'closure' is not subsettable

aeid <- c(3094:3098, 3223:3238)
tcplPlot( type = "mc", fld = "aeid", val = aeid, output = "pdf", fileprefix = paste0("output/New_Plots/plots_by_aeid/plots_yrange_125_CCTE_Deisenroth_DEVTOX",
Sys.Date()), multi = TRUE, verbose = TRUE, flags = TRUE, yuniform = TRUE, yrange = c(-125, 125))

Well types present include:

unique(mc0$wllt)
[1] "p" "b" "y" "n" "t" "o" "z" "x"