As some others in this formun too, I recognized similar Java caused TolpologyView Problems.
But not allways: With all clients in this network including the local IE on LMS server too - sometimes the start of TopologyView is working, sometimes not:
In Failure-Situation: Cannont conect to ANIServer: null, unknown error
I switched also the Windows-Firewall (tuned for all LMS-Apps and DFM with monitoring via logging for blocking connections before) at LMS server off - no changed behaviour. There is no other firewall in between, direct connection - that means Proxy exception set in browser. The problem is the same with IE and Mozilla and also the same with local and ACS remote users. Would be nice if I can switch the Windows-FW on again, because its actually a must from the security department at this customer that the windows firewall is active.
Attached is a screenshot of the error message, status bar of connecting ANI... und the Java-console-log in Failure-Situation.
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