GRASP-R documentation sucks…

I tried to use GRASPeR to predict presence today. The problem encountered is that when I use "Model" operation from the GUI, R (mgcv library) gives error message saying that the number of "knots" exceeds the maximum allowed value. It hints that I can get round this either by increasing maximum knots number using

gam.control

, or by changing the smoother to other types instead of the default thin plate, using

s

function in

gam

command. However, I found that with GRASPeR I cannot change these values. It seems that GRASPeR defined these values as default but I cannot find where to modify them.The documentation of GRASPeR gives only usage of GUI and functions provided by it. No troubleshooting section, no file format description, no description of dependency. I am really mad about it.I downloaded the source code of GRASPeR, see if I can get round my problem by modifying the source and recompile. If not, I will have to use some more primitive methods, such as typying command one by one by myself