I am trying to make a simulation using HEC-GeoHMS in ArcGIS and I have encountered a problem near the final steps. In the drop-down menu HMS, when I click "Check Data", a report is being done and displayed in Notepad with the layers and information verified for eventual problems. The report returned 5 problems, regarding the river connectivity. This is the exact message: End of checking river: oid=5 - PROBLEM: connectivity missing. Though I have tried solving this by merging the rivers (as I have merged some sub basins to better match the real situation of the watershed) or by manually snapping the rivers(it wasn't the case because they were already snapped to the main river, but just in case) and still I receive the same report with these problems. The hydro network is counting 12 rivers and 5 of them have this connection problem.
Has anyone faced this issue and solved it?