SCA "Invalid State Machine" Error when Receiving a SIP BYE (Doc ID 1314395.1)

Last updated on SEPTEMBER 12, 2016

Applies to:

Oracle Communications Network Charging and Control - Version: 3.2.0 and later   [Release: 3.2.0 and later ]
Information in this document applies to any platform.


- SIP stands for Session Initiation Protocol
- SCA stands for SIP Call Agent

  1. The /var/adm/messages or SCA log files write this following error message:
    ERROR: ( 1500: State machine error; transition: IN_RELEASE_A, state: Closing

  2. Apart of call flow, we can see SIP proxy of A-Leg is flooding with BYEs message to the SCA, in normal circumstances this particular BYE message is only sent once.


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