Symptoms

Error deploying workflow in web designer
 

Diagnoses

Updated a workflow, saved it, then tried to deploy it in web designer and got the following errors:

Deploy Failed

System.Exception: System.UnauthorizedAccessException: Access to the path 'C:Usersrusername]AppDataLocalTemp mp2481tmp' is denied.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.Directory.InternalCreateDirectory(String fullPath, String path, DirectorySecurity dirSecurity)
at System.IO.Directory.CreateDirectory(String path, DirectorySecurity directorySecurity)
at SourceCode.ProjectSystem.Project.CreateBuildProject()
at SourceCode.ProjectSystem.Project..ctor(String name, String path)
at SourceCode.WebDesigner.Authoring.SharePoint.GenerateProcess.Generate(String UserName, Int32 ProcessID, String InputData, String ProcessXML, String ConnectionString)
at SourceCode.WebDesigner.Authoring.SharePoint.GenerateProcess.Generate(String UserName, Int32 ProcessID, String InputData, String ProcessXML, String ConnectionString)
 

Resolution

Adding the "Authenticated Users" group and granting "Modify" rights to the "C:Users" and all folders below on all SharePoint Web Front Ends as per below documentation resolved the issue:

http://help.k2.com/onlinehelp/K2blackpearl/ICG/4.6.9/webframe.html_Install_K2forSharePoint.html