Resolution:
The error means the arguments passed to Rendezvous are incorrect.  The IC_TIBRV_* settings in icconfig.xml and icrepconfig.xml need to be checked.  Look for control characters in the text files or missing XML end tags.  Validating the XML config files with a browser is a quick test of the correctness of the XML.

For example the following was provided by IE 7:

The XML page cannot be displayed
Cannot view XML input using XSL style sheet. Please correct the error and then click the Refresh button, or try again later.


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End tag 'IC_TIBRV_DAEMON' does not match the start tag 'tibrv'. Error processing resource 'file:///C:/Logs/SR_1-A80VVN/icre...

            &ltIC_TIBRV_DAEMON default="tcp:40200"/&gttcp:40200</IC_TIBRV_DAEMON>
---------------------------------...

InConcert debug log shows either Error, TIBRV, 3: Invalid argument or in the case of the IcRepDaemon: "IcRepDaemon7013 t006: debug: Transport create failed, error: Invalid argument".