"The start time is not valid for the gage time interval. Do you want a new suggested start time?"
I always get this message. even using different computers. Even if you let HEC-HMS suggests you a new start time, it won't accept it.
I tried creating a Control Specifications and then call it when creating the Time Window, and also tried to add the time manually. It didn't work in any of the situations.
If anyone can help, it would be really appreciated.
Best regards.