I am trying to use the MCScanX tool for ploting circular displays of syntenic genomic blocks.
When I try running $ java circle_plotter -g gff_file -s collinearity_file -c control_file -o output_PNG_file
I get the follwing error: Exception in thread "main" java.lang.NullPointerException at circle_plotter.paint(circle_plotter.java:142) at circle_plotter.main(circle_plotter.java:262)
Does anyone know how to solve it?
Many thanks in advance.