Running examples in ‘fplot-Ex.R’ failed
The error most likely occurred in:

> ### Name: fit.off
> ### Title: Closes the current plotting device and shows the result in the
> ###   viewer
> ### Aliases: fit.off
> 
> ### ** Examples
> 
> 
> # Exportation example
> # The functions pdf_fit, png_fit, etc, guarantee the right
> #  point size of the texts present in the graph.
> # But you must give the exact size the graph will take in your final document.
> # => first use the function setFplot_page, default is:
> # setFplot_page(page = "us", margins = "normal")
> # By default the graph takes 100% of the text width
> 
> data(us_pub_econ)
> 
> tmpFile = file.path(tempdir(), "DISTR -- institutions.png")
> 
> png_fit(tmpFile)
> plot_distr(~institution, us_pub_econ)
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(top.value2display, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(v_max, units = "in", cex = top.cex) :
  no font could be found for family "Arial"
Warning in strheight("W", "in", cex = top.cex) :
  no font could be found for family "Arial"
Warning in strwidth("W", "in", cex = 1) :
  no font could be found for family "Arial"
Warning in strwidth(y_labels, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(y_labels, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(y_labels, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(y_labels, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(y_labels, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(y_labels, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(y_labels, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(y_labels, units = "in") :
  no font could be found for family "Arial"
Warning in strwidth(myLabels[1], units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Warning in strwidth(myLabels, units = "in", cex = myCex) :
  no font could be found for family "Arial"
Error in seq.default(line.min, line.max, by = line_step) : 
  invalid '(to - from)/by'
Calls: plot_distr ... find_margins_bottom -> xaxis_labels -> seq -> seq.default
Execution halted