[Tugindia] psbezier

[Ravi Gautam]

Dear Tex users,
I am confused about psbezier. It takes more than 4 control points without any problem. But It gives error output for 3 and lesser number of control points. It simply adds one control point probably (0,0) on its own. Please let me know if there is any solution to this problem.
One way is degree elevation. That will plot the curve. But for my specific purpose I want the plots with original control points. 
Thanking you in advance.
regards,
gautam