24-04-2015, 11:36 AM
I just tested with a storage process like you described.
My test process has both Input and Output Auxiliary flows.
I use FLO_FUNC to link the input Auxiliary flow to the input of the storage process (ELC) and the output Auxiliary flow to the output (also ELC).
It worked well. I also checked all the storage equations, and they looked fine.
Consequently, as far as I am concerned, your problem is not a known problem, but a problem quite unknown to me, at least for now. 
If the problem persists, please try providing more details on the process description (as requested above), to shed some light on it.