Dear Eric It works now correctly by DOVECT => 0. Thank you very much for your kind help. Best regards Yoshiaki Sofue >It appears that you have DOVECT set greater than 0 - the task is trying >to find a polarization image to draw the vectors. Under user 2 the >DOVECT adverb is probably 0 or -1. > >Eric Greisen ---- Y.Sofue sofue at ioa.s.u-tokyo.ac.jp