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You attempted to start a channel or client application connection. The start failed and found the CSQX631E (z/OS) or AMQ9631 (other platforms) in the error logs.


The CipherSpecs on each end of a channel do not match.


Alter the channel definitions and/or client application so that each end of the channel specifies the same CipherSpec. See here for more information here.

More info here.

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