Warning:"The energy equation could not be balanced..." in steady flow simulation. Any solu

[robdir]

Hi everybody,
I'm trying to study a river about 3.50 km long with two very sinuous reaches.
In some cross sections of the sinuous reaches (but also in some regular reaches) I get this warning :
"The energy equation could not be balanced within the specified number of iterations.
The program used critical depth for the water surface and continued on with che calculation".
I tried to enter more cross sections before and behind the "critical sections" and I assigned different values to nManning (n= 0.033 to the main channel and n=0.045 to the left and right overbanks) but it didn't solve the problem.
Further, the critical depth assigned in these cross sections varies as I move up or down the levee position...
Can anyone help me?
Thanks

p.s.: I attached my profile

 

[chicopee]

Meandering streams are tough to analyze as I found out when I used HEC-RAS ver4.

 

[cvg]

use the mixed flow setting for subcritical / supercritical