Hi ,
I develop a complex Project Server 2013 workflow with is used in an EPT. In this workflow I have many task process actions. Some of actions are assigned to Sharepoint groups - for example workflow has to notify "Administrators for Project Web App" about new project. Administrator performs some actions and sends the project to a next workflow stage by completing a task process.
If a project created by an user who is a member or "Administrators for Project Web App" workflow works OK. If the user isn't a member of this group - Workflow halts.
In ULS I found this error: 11.07.2014 17:30:46.69 w3wp.exe (0x4C54) 0x5128 SharePoint Foundation CSOM ahjq1 High Exception occured in scope Microsoft.SharePoint.SPUserCollection._SerializeToOData. Exception=System.UnauthorizedAccessException: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))
I've found this article http://msdn.microsoft.com/en-us/library/office/jj822159%28v=office.15%29.aspx on Elevated Permissions work SP2013 workflows. But I can't understand is it related to Project Server Workflows too.
Thanks for your help!