division by zero and access violations

[Admins]

Ok checked it, the problem is that you are not setting profiles for the gui controls, so it has problems to calculate the size of the scrollbar and such. The crash / error is fixed in the next version of v4, it would still be good to set some profile to the controls (profile = GuiScrollProfile or so).

'savelines' is saving an array into a file. Checking your script, I guess you would need to do something like:
temp.var = {params[1]};
temp.var.savelines(filename,doappend)