I've had a similar classpath problem and it was fixed by saying SET CLASSPATH=.; (no spaces between =.;) This apparently tells the javac "Look in my folder you idiot!" But for me java3D just worked so it could be it messed up and didn't install into your JDK. Or maybe you have 2 JDK's and it picked the wrong one. If that isn't it I don't know but I had a similar problem with the JMF and I found these lines in the readme set CLASSPATH=%JMFHOME%\lib\jmf.jar;%JMFHOME%\lib\sound.jar;.; %CLASSPATH% (last 2 lines on 1 line) set PATH=%WINDIR%\System;%PATH% and it worked. Then I installed java3d on top of this and it worked hope this helped =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".