error in IJ.setTool(int tool)->setTool2()

[vidya]

Hello ImageJ,

 

I am using imageJ methods without displaying the GUI.  When I try to use IJ.setTool(Toolbar.OVAL), I get an exception at setTool2() private method at the following line. 

 

g2d.setRenderingHint(RenderingHints. KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

 

Its a NullPointerException that is thrown since g2d is null. Please let me know how I can solve this.  I work on windows Vista.

 

 

thanks for any help

V. Chin