- 
							
							
							
								Hi Aurelian, 
 
 Thank you very much.
 
 Laura
 
- 
							
							
							
								Hi, 
 
 I have very limited data for my model, including no data for the lower boundary condition so I want to define it as 'free outflow'. However, I cannot find an option to do this in MIKE 11. As far as I can see the only option in MIKE 11 for boundary conditions which doesn't require additional data is 'closed' which is not applicable here.
 
 Any ideas would be appreciated.
 
 Laura
 
- 
							
							
							
								Thank you for your help. I will take a closer look at my cross section data.
 
 Laura
 
- 
							
							
							
								Hi, 
 
 I have exported the data for the cross sections in question.
 
 Thanks in advance for any help.
 
 Much appreciated.
 
 Laura
 
- 
							
							
							
								Hi, 
 
 I am using MIKE 11 to create a model of the main branch of a river. I have imported my cross sections as raw data (X, Z) however when I run the simulation I get the following error:
 ERROR: Processed hydraulic radii must be positive.
 Cross section as reach 'MAIN BRANCH', chainage 2000.00 m.
 
 I have looked at the processed data for this cross section and for the last two rows, the hydraulic radius has been calculated as 0- but I dont know why. I have attached a screen shot. Any guidance welcome.
 
 Also, I dont have any data available for the lower boundary condition so was hoping to define as free outflow- what option in boundary data editor would this be?
 
 Thanks.