Start Appraisal button gone missing

[Nic1]

I've set up an appraisal template (objective setting)which allows part appraisers. When I run the thing (via portal & BSP) with just the employee and line manager in the doc it works 100%. It goes through the review stage etc etc all the way to completed.

As soon as I enter a part appraiser and create a doc, the Start Appraisal (START) button disappears from the In Review stage!

Why does my Start button show (for docs In Review) when I have just employee + manager, but when I have employeemanagerpart appraiser the thing disappears?

Thanks.

[Nic1]

My 'Person Authorized' in the Status flow tab is set to All Users.

I will sit with my friendly ABAP'er today and try the the BADI you suggested.

You might also be interested in this SAP note I found & implemented to stop the button disappearing but it had no effect: 914198