I cannot change the project start date

You may receive the following message when trying to change a project start date.

The project open date cannot be changed because there are scheduled hours, requested hours, incurred costs, planned costs or role start dates prior to the entered date.

You will need to modify your project to account for the fact that the project start date is moving. This is necessary to maintain project data integrity. For example, it does not make sense to have time cards on a project before it even started!

Check	Description
Scheduled Hours	Go to the Resource Scheduling tab of the project editor in scheduler mode. Choose to view booked time. Set all booked time to zero hours prior to the new start date.
Requested Hours	Go to the Resource Scheduling tab of the project editor in project manager or scheduler mode. Choose to view requested time. Set all requested time to zero hours prior to the new start date.
Incurred Time / Submitted or Approved Time	Create a time card listing report to show time against your project. If there is any time prior to the project start date you can use the time browser to reject or set it back to unapproved status.
Incurred Costs / Submitted or Approved Expenses	Use the expense browser to find cost cards. Set them to draft or rejected status. Cost cards on an non-issued invoice need to first be removed from the invoice. Issued invoice cost cards need the invoice voided and to be removed.
Planned Costs	Got o the cost planning tab of the project editor and create a new cost plan that begins after the project start date.
Role Start Dates	Go to the Roles tab of the project editor and check that the role start date for all roles is at or after the new project start date.