ATOMFT ver. 3.11, copyright(C) 1979-93, Y. F. Chang. ----------------------------------------------------- COPTION DOUBLE,DUMP=1 DIFF (X1,X,1) = 4.0 * X2 - 2.0 * DIFF (X2,X ,1) - 2.0 * X1 DIFF (X2,X,2) = 3.0*DIFF(X2,X,1)-2.0*X2-DIFF(X1,X,2)-DIFF(X1,X,1) C +X1 $ **ERR029** these ODES cannot be ordered. The possible undefined variables are:-