When a project is opened in Microsoft Project (MSP), using the XML format, the task progress (% complete) is set to zero (0) on assignments where there is no work completed. This problem affects sub tasks, including tasks that show underneath the project level summary task. In this scenario tasks statuses change from Started to Not Started.
Steps to Reproduce:
Expected Result: Hit F9 button and Task % Complete is 50%
Actual Result: Hit F9 button and Task % Complete is 0%
Release: All Supported
Component: Microsoft Project (MSP)
The problem is caused by an MSP issue when using XML format, and the MSP drivers for CA PPM v14.1+ use XML format
Check to make sure you are on the latest supported MSP update as this issue is no longer reproducible in testing on later MSP versions.
The resolution is to enable automatic calculation by default (and in step 3), with this set there will be no need to press F9 anymore
Reference: