The complete list of engine and GUI changes can be found in this text file on the EPA Site http://www.epa.gov/nrmrl/wswrd/wq/models/swmm/epaswmm5_updates.txt
This note categorizes the engine changes by aggregating dynamic wave solution changes, surface ponding changes, RDII and Hydrology for example. The number preceding each change is the change number per engine update – the version of the engine update is shown at the end of each change paragraph. The Categories are General Changes, Dynamic Wave Changes, RDII Changes, Infiltration and Surface Runoff Changes, Climate Data Changes, Rainfall Changes, LID Changes and Water Quality Changes.
Build 5.0.018 (11/18/09)
2. Missing values for accumulation periods within an NWS rain