LON communications is intermittent at best on a new installation of a Jace-645.

Issue

Replaced a Niagara R2 UNC with a Jace-645 embedded with R2.  LON communications was stable at first but now it is intermittent. 

Product Line

TAC I/A Series

Environment

Niagara G3 - AX version 3.6.47 or higher

Niagara R2 version 535

Cause

The intermittent LON communications issue was identified and a supporting jar file in R2-535 needs to be upgraded.

Resolution

Replace the lonworks jar file with this updated version:   lonworks-2.301.535c.zip

http://buildingsdownloads.schneider-electric.com/search#documentDetails/129435/lonworks-2.301.535c