When using a Data Hub file without regional losses (perhaps because they are missing from the Data Hub), RORB gives an appropriate error message; “Error reading the losses from the file….” and greys out the OK button in the Design Rainfall Specification (ARR2016) dialogue.
If I click OK and then uncheck the “Use regional losses” check box, I was expecting the OK button to be enabled. It isn’t.
The workaround is to click Cancel and then run the model again. Then uncheck “Use regional losses” before clicking ok.