Hi I am new to this list and quite new to R and Shiny, so am likely to expose my ignorance about things I should know. My first ShinyApp runs as expected under RStudio, but when I publish it using ShinyApp.io it gives on startup the error message: "plot.new has not been called yet", even when I do call plot.new. Earlier versions (which I have not kept) did work as expected, and I do not know what I am doing differently now. The R code can be viewed here: https://drive.google.com/folderview?id=0B2pp1x41KL5XZUVmMFAydUxMemM&usp=sharing Any advice would be much appreciated. Thanks Michael