Release of SWMM 5.1.004 

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Build 5.1.004 (4/14/2014)
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Engine Updates:

1.  Support for the Ignore RDII analysis option was added to
    the engine.

GUI Updates:

1.  A refactoring bug that ignored any changes to numerical
    precision made in the Program Preferences dialog was fixed.

2.  Another refactoring bug from 5.1.003 that caused projects
    with groundwater aquifers not to run was fixed.

http://www.epa.gov/nrmrl/wswrd/wq/models/swmm/#Downloads


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