I just ran-into this issue last night(almost literally right into the 4 port gateway while batten was down). I've got a work around I'll describe later, yet has anyone discovered the issue causing? Being I can't recreate the issue I'm unable to prevent it in future.
This past saturday(3/25/12) we struck our musical. Over the following 3 days set-up general stage wash for rentals. When attempting to get scrollers working in the 'Rental' show file, they just wouldn't do anything. The Power signal lights on both scrollers, power supply and 4 port gateway were on/flashing as the should be. During strike the scrollers, cabling, power supply, DMX gateway didn't move as for pan/tilt nor did they change where hung on batten, NOT EVEN the cabling moved. I did verify all connections just for shitsNgrins:) I got my laptop out and check on the Gateway via G.C.E. GCE only found my RFR base online. unpluged the nework from the 4 port gatewayst , 10 count, then plugged back in. GCE found the gateway about same time the power supply did. Now it works as expected.
I'm totally dumb-founded here. Never have I had a piece of ETC equipment require a restart because it didn't want to function. To fix an intermittent hick-up is different, and expected.
So for the work around:
Just had to 'restart' the gateway. By unplugging the Network cable(I have PoE network) and plug back in.
The short version:
Lights say, 4 port DMX gateway working but GCE doesn't find it as an 'online' device.
Anyone else experience this issue?