This message means that a trend tag has been defined for a trend block. However, it is not used on any graphic, so it might be causing undue load on the system because its exception reports are not being used in the history system.
--Scanning graphic 4TRENV01 STACK FLOW (4TRENV01) Trend index 1010 (tag 4RAVAVGFLOWAB) does not reference a trend in any associated trend database.
This error can be built directly into Hyperview. For more information, see the article Building error reports into the M14.