When trying to extract results from a Quick Sensitivity, either ran with GUI or API, I get the same message : 

tol_data_viewer = zos.system.Tools.OpenToleranceDataViewer()
tol_data_viewer.FileName = r"C:\full_path_to\quick_sens.ZTD"
tol_data_viewer.RunAndWaitForCompletion()

if not tol_data_viewer.Succeeded:
    print(tol_data_viewer.ErrorMessage)
tol_data_viewer.Close()

cannot parse Sensitivity data: L'index se trouve en dehors des limites du tableau.

Are results from quick sentitivity supposed to be compatible with the read of the API ? because it is compatible in the GUI