It doesn't actually crash, does it? Just fails to display the
Lorenz 
 curve graph?  
well, it did crash...without displaying the graph!
 That's fixed in CVS: we down-sample if
 there are too many points for gnuplot to handle. 
That's good! With the new CVS
gretl doesn't crash anymore but fails to 
show the graph (neither the text window) and produces the same error 
message :-[
Best,
artur