Conditional assemblies merged in ModelArtifact in 13.1.6https://www.dotnetzone.gr:443/cs/blogs/abekiaris/archive/2013/08/14/conditional-assemblies-merged-in-modelartifact-in-13-1-6.aspxHello all, The following modules do not exist anymore in 13.1.6.1 ConditionalActionState , ConditionalControllerState , ConditionalObjectView now are under the ModelArtifact omprella. Also Logic.Win merged with Logic module. So you need to remove allelCommunityServer 2.1 SP3 (Build: 20423.1)