I took an alert as following and I have seen it on *.info file. Please help me what shold I do. I am sure, my simulation's inputs are correct.

Also I have warnings other free surface substeps(4,5)

*** FREE SURFACE SUBSTEP = 3; SUBSTEP TIME = 0.368853E-02 s

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*** WARNING #042 *** PROCESS NOT FULLY CONVERGED -- EQ.,NIT,RESI: SC1 101 0.17167E-01

*** WARNING #044 *** SOLUTION RESCUED AT RESIDUAL LEVEL 1.565605E-02

MAXIMUM COURANT NUMBER = 6.872E+10 AT CELL 80073 MEAN COURANT NUMBER = 4.808E+09

*** WARNING #042 *** PROCESS NOT FULLY CONVERGED -- EQ.,NIT,RESI: UMOM 101 0.51701E-01

*** WARNING #043 *** MINIMUM RESIDUAL AT THE END, RETURNING NON-CONVERGED SOLUTION

*** WARNING #042 *** PROCESS NOT FULLY CONVERGED -- EQ.,NIT,RESI: WMOM 101 0.21023E+01

*** WARNING #044 *** SOLUTION RESCUED AT RESIDUAL LEVEL 1.270179E-01

warning 42 43 44

My model is two phase flow in mini square channel and ıts method ıs free surface (vof).

please help me, what ıs the wrong?