Hi,all: I run the turbChannel example, and find a strange thing related to output. In the means.dat, #time = 8.0000000E+01 # y y+ Umean 0.000000000E+00 0.000000000E+00 0.000000000E+00 2.565198406E-03 1.235928661E+00 1.240919300E+00 8.166000752E-03 3.934430317E+00 3.853070992E+00 1.581402413E-02 7.619295888E+00 6.748781538E+00 2.418599733E-02 1.165296502E+01 8.841965326E+00 3.183402071E-02 1.533783060E+01 1.011635642E+01 3.743482305E-02 1.803633225E+01 1.084184821E+01 4.000002146E-02 1.927226091E+01 1.113974222E+01 4.000002146E-02 1.927226091E+01 1.113974222E+01 take a look at the last two lines, it's same! So the solver output the duplicate values, how can I correct this strange behaviour? Have a nice weekend Xianbei