STATUS_MAX_POST_SIZE_EXCEEDED warning

SmartClient Version: SNAPSHOT_v9.1d_2014-01-24/Enterprise Deployment (built 2014-01-24)
FireFox 26


One of our testers received the following warning message when clicking on a tab as part of test case execution:

"The server did not receive the data that was sent to it.

Please see the documentation for
isc.RPCResponse.STATUS_MAX_POST_SIZE_EXCEEDED
"

We have only seen this warning come up once and have not been able to reproduce it again.

Neither the client or server isomorphic 4.1d javadocs for RPCResponse have any information on this warning.

Can you give me any information on the cause of this warning?

Thks