I have been working with K2 on a dev box for several months with no config problems. On Monday I started getting namespace errors for any build. I get the error even for a brand new workflow with a single activity. My configuration included Office 2003, Outlook Express and InfoPath 2007.
Earlier that same day, my IT admin installed Outlook and Visio 2007. They inadvertently uninstalled Office 2003 and had to reinstall Word and Excel 2003.
I uninstalled Visio 2007 thinking that might be the problem, but did not help.
I read http://k2underground.com/forums/thread/24126.aspx, but was reluctant to re-install .NET components that have been working just fine.
The errors look like this for a workflow with a single mail event.
Error 1 A namespace does not directly contain members such as fields or methods F:K2 DevelopmentProjectsDemo2Demo2ExtenderProjectsCSWinWF-4012594a13a84393b2815a2530a12899EventItem_32fb1e28d40b476799064c55e9bb138e.xoml 1 1 CSWinWF-4012594a13a84393b2815a2530a12899
Ideas?