Unable to login on primary hub

Document ID : KB000127248
Last Modified Date : 19/02/2019
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Issue:
The ip address that appears under error message, is related to another hub (not the primary), in this case, a secondary one that had already being removed from UIM. 

No communication with controller (XXX.XXX.XXX.XXX)   --> where XXX.XXX.XXX.XXX isn`t the primary hub ip address 

 
Resolution:
Identified that the hub information was configured under registry. 
Open regedit -> HKEY_CURRENT_USER -> Software -> Nimbus Software -> NimBUS Manager -> Options and here verified that exist hub login key pointing to incorrect address.
Removed it and problem was solved