All the tabs vanish after seeing the Process Flow Diagram for a process on the Cost Plan object
Steps to reproduce:
Expected result: Process --> Available page should be shown.
Actual: result: Process --> Available page is shown but all the tabs are gone.
Due to defect DE32081.
CA PPM 15.1
The development team has looked into this problem and targeted to fix the same in the upcoming major release of CA PPM, that is 15.3.