I am getting the following error message on a certain drainage project:
"Time of Concentration Outside Rainfall Table"
I have checked all of my drainage areas and all have a manually entered Tc of anywhere between 4.9 and 15.2 minutes, well within my library's rainfall data. My minimum Tc is set at 5 minutes. The one area that I have a Tc of 4.9 processes using the minimum of 5 minutes, which is what I expect. All of the others seem to produce normal results with their larger Tc's.
Should I be concerned about this error message?
Josh Mauritz
MS v08.11.05.17
GPK v08.11.05.39