Normal Flow initial condition not found https://dlt-acc.firelay.cloud/c/message_boards/find_thread?p_l_id=3228466&threadId=4231595 2026-05-12T13:22:10Z 2026-05-12T13:22:10Z Victor Chavarrias https://dlt-acc.firelay.cloud/c/message_boards/find_message?p_l_id=3228466&messageId=4231641 2021-06-11T13:18:41Z 2021-06-11T13:18:41Z

Hi<br /><br />I guess you are getting the error in the log-file:<br />-ATTENTION!!! Normal flow initial condition not found. Maximum relative error<br /><br />The essence is that the non-linear solver does not find a solution. It is difficult to know what is the problem without the input. What is your input? In general, I would follow the following strategy to find the issue. First, double check that all input make sense. If you are using a lot of size fractions, consider reducing the number of size fractions to make life easier for the solver and see whether it also has a problem in that case. To check that what you want to do is indeed happening under the hood, consider running in debug mode (there is a flag for it). This will allow you to stop the simulation, for instance, in &lt;ini_normalflow_L&gt; before calling &lt;get_equivals_V&gt;. Finally, you can directly call this functions outside Elv to make it even simpler to debug. <br /><br />V

Victor Chavarrias 2021-06-11T13:18:41Z Mieke Scherpbier https://dlt-acc.firelay.cloud/c/message_boards/find_message?p_l_id=3228466&messageId=4231594 2021-06-11T13:04:54Z 2021-06-11T13:04:54Z

I am using initype=1 to set normal flow conditions but get the warning that &#34;normal flow initial condition not found&#34;.  From what I can tell, the equilibrium slope does not converge in the solver. I am using constant sediment and water discharge. The downstream boundary condition is water level. Any suggestions to resolve this?<br />Thanks!

Mieke Scherpbier 2021-06-11T13:04:54Z