I stumbled over this when using unbound variables in queries. Librdf issues a warning which is stored as an error in RedlandWorld:handleLogMessage and causes an exception to be thrown in RedlandWorld:handleStoredErrors. One workaround is to store only messages with LIBRDF_LOG_FATAL and maybe LIBRDF_LOG_ERROR as actual errors.
I stumbled over this when using unbound variables in queries. Librdf issues a warning which is stored as an error in RedlandWorld:handleLogMessage and causes an exception to be thrown in RedlandWorld:handleStoredErrors. One workaround is to store only messages with LIBRDF_LOG_FATAL and maybe LIBRDF_LOG_ERROR as actual errors.