Veiled I finally succeeded has to make a tank I put train_spline_control that I have to call ctrl1 ctrl2 I have to add has two of the spline hand the value control and ctrl1 and has the other control ctrl2
When I make the menu plug in I make bobtoolz ---->plot splines to see the white line of the advance of the tank but no white line I appear do not know why Could you say to me why no white line appears when I make the plot splines
Your info_train_spline_control needs a targetname. Then, one of your info_train_spline_main entities must have the key “control” with the targetname of the info_train_spline_control as its value. You may use the button with the train symbol then to plot the spline paths.
my train_spline_control has this value targetname ctrl1 and my train spline hand has these value targetname spln8 target spln9 control ctr1l
and its does not go when same
Have a look at this example map: http://mitglied.lycos.de/Shaderman/maps/examples/2_way_tank.zip. It should help you 
cest what I have make but stud slpines does not show me the white line
the key/value of control
targetname ctrl1
the key/value of the spline main
targetname spln8
target spln9
control ctrl1
and whyte line is not here