In the Web Agent traces, messages like these can be seen:
[<Date>][<Time>][<TransactionID>][IsResourceProtected][Communication failure between SiteMinder policy server and web agent.]
But users report no problems.
LogMessage:ERROR:[sm-Server-02740] Failed to retrieve the value.
There were 3 active expressions. They have been removed and authentication went through very fast.
If it is not the above, it can be due to a bad request.
In case someone is forging a request passing invalid query parameters such as agentname to the login.fcc, so when the Agent sends this data to the Policy Server, the Policy Server may find this request to be invalid and result in this error being logged (4).