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internal error at line 1419 in file

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Old   December 30, 2015, 03:18
Default internal error at line 1419 in file
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chenxiaohu
Join Date: Dec 2015
Location: Shanghai Jiaotong University, Shanghai, China
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Hi, everyone,
mixing layer, 300000 grid, LES,
BC: mass flow rate,wall, pressure out
density-based, time step size 4.526e-7,
density: ideal gas, viscosity: sutherland
Than, the error is shown as the picture follow....
Divergence detected - temporarily reducing courant number to 0.003 and try again....
Divergence detected - temporarily reducing courant number to 0.0003 and try again....
Divergence detected - temporarily reducing courant number to 3e-5 and try again....
Divergence detected - temporarily reducing courant number to 3e-6 and try again....
error: internal error at line 1419 in file '..\..\src\rp_mstage.c'
Divergence detected in AMG solver
Error object: #f

please help me ,thank U very much in advance...i don't know how to solve the question, please give me some tips.
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