This is so frustrating. I have an irregular time-series for gate operation that is saved in a DSS file and have data during the simulation period. I can use HEC-DSSVUE to open it without any problem. However, when I specified the irregular times-series for gate openings (unsteady flow data -> T.S. Gate openings -> Read from DSS before simulation) in HEC-RAS, I got an error message which says “No values specified to read, if a time window was entered, make sure it is the right one for this data”. I tried to change part D of the DSS path in different way, but still got the same error message. Just wonder whether HEC-RAS can handle irregular time-series. Has anybody met the same problem before and found a solution? Thanks.