BS450 SW-Version 4.5 not manageable with Device-Manager 5.7.9

[Wini]

Hello Nortel-freaks,

I have a problem with a recently upgraded stack of 3 BS450:
Using SW-release 4.5 now, the stack is longer manageable using the latest available release of Device-Manager which is 5.7.9.
The device appears correctly in size but the picture is
greyed completly.
Apparently the SNMP-data cannot correctly be interpreted
any longer.

Anyone with similar experience ?

Greetings

Wini

 

[NARBE]

Hello,

Me too but I'm using DM 5.7.6.0. Even the pings to the management are slower (or some timouts)
I'm planing to open a case.

Greetings

Narbe