You cannot delete or modify a project summary task. A project summary task summarizes your entire project. You can change its wording, attach a note to it, and hide or show it; but you cannot delete it, link it to a task, assign non-budget resources to it, or perform other actions that you can only perform on summary tasks and subtasks. To hide the project summary task, click Project Summary Task on the Format tab.
You cannot create a map with duplicate table names.}The same name was specified for more than one table. Enter a unique name ...
You cannot create a project site at the specified location.}Project sites must be created under the default site collection. ...
You cannot create links between tasks when circular references exist.}The successor of a task refers back to the same task ...
You cannot create or change summary tasks with assignments while using Project Web App. If you wish to make this change, ...
You cannot delete or modify a project summary task. A project summary task summarizes your entire project. You can change ...
You cannot delete or modify a project summary task.}A project summary task summarizes your entire project. You can change ...
You cannot edit tasks with cost, material or budget resources while using Project Web App. If you wish to make this change, ...
You cannot edit the duration of a summary task or inserted project task because it is calculated by Project.}To change the ...
You cannot edit the selected resource. It is most likely that you either don't have permissions to view the resource details ...