We've received several error reports from customers over the past couple of days about errors when running reports in Stonefield Query. The most common error is "Cannot load XFRXLIB.FLL". It turns out that a recent change in the definition files for the Trend Micro anti-virus software was erroneously flagging one of our DLLs, HNDLIB.DLL, as a suspect file and quarantining it. Since XFRXLIB.FLL relies on that DLL, it fails to load so Stonefield Query can't run reports.
Apparently Trend Micro has fixed the problem, so updating to the latest definition files should resolve the problem, although you'll have to manually remove HNDLIB.DLL from quarantine.
Even if you're not using Trend Micro, it's likely a good idea to configure your anti-virus software to not scan the Stonefield Query program folder.
Update: see http://esupport.trendmicro.com/support/viewxml.do?ContentID=EN-1036613&id=EN-1036613 for instructions on configuring Trend Micro to allow or block specific programs.