<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hello,<div> I installed grads v2.0.a4.oga.1 and tried to add libipc.gex extension into /usr/local/bin/gex. The GAUDXT is defined as GAUDXT=/usr/local/bin/gex/udxt. But when I started grads and type 'query udct', I saw the message of Invalid QUERY argument: udct. Can anyone tell me what is happening? Thanks!</div><div><br></div><div><br></div><br><br><div> <p style="margin: 0.0px 0.0px 0.0px 0.0px"><font face="Helvetica" size="3" style="font: 12.0px Helvetica">Dr. Hai-Ru Chang</font></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px"><font face="Helvetica" size="3" style="font: 12.0px Helvetica">School of Earth and Atmospheric Sciences</font></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px"><font face="Helvetica" size="3" style="font: 12.0px Helvetica">Georgia Institute of Technology</font></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px"><font face="Helvetica" size="3" style="font: 12.0px Helvetica">Atlanta, GA 30332-0340</font></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px"><br></p> </div><br></body></html>