Sorry! Crystal Ball! that's was funny ;D I'm using XP SP2 + Ryan 2.1.7 Sun Java 1.5.10 WPI 5.6 via cmdlines.txt fully the default methods, I don't play around much the weird thing, that when I use this erreneous WPI on VERY ORDINARY UN-TOUCHED XPSP2, there was no error message! EDIT: WPI v5.0 working 100% normal WPI v5.4 , WPI v5.5 , WPI v5.6 showing the same error message something is wrong in Line 101, Char 2