"An internal issue has occurred" trying to install a collector on Oracle RAC (81874)

Trying to install collector agent on node 1 of 3 node RAC (Oracle 11.2.0.2 on Solaris SPARC v9) produces error "An internal issue has occurred". The installer.log contains the following exception...

Tue Sep 6 15:04:39:209 2011: INFORM: ErrorApiOutput.java:39:log(): int ReturnCode = 1010111
Tue Sep 6 15:04:39:212 2011: INFORM: ErrorApiOutput.java:39:log(): String ReturnMsg = Setup Failed
Tue Sep 6 15:04:39:215 2011: INFORM: ErrorApiOutput.java:39:log(): }
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Tue Sep 6 15:04:39:220 2011: EXCEPTION
Message(SCException): "API function: "Setting up agent; please wait" ("scSetupInternal") Failed. Return Code: "1010111", Return Message: "Setup Failed""
Message(User): "An internal issue has occurred"