This looks like a validation error in the WF designer but maybe I'm going about it entirely wrong.
Goal
To have a workflow establish an http session in a web app and perform a routine per document and not trip over other sibling workflows.
Issue
If I have the workflow login and logout of the webapp, with some activities in between, it appears this will cause conflict if say 40 of these workflows fire at once. They'll end up logging each other out of ASP.net sessions and stumbling over each other.
If I have one workflow login, then try to loop two activities using either a while or a for each, the activity after the loop won't validate.
Any advice appreciated,
Carl