The error types in this file have not yet been converted to work with the error browser.
A trend block (TREND: Analog Trend [FC66] or ETREND: Enhanced Trend [FC179]) that has no tag cannot be fetched from the controller. If your system has a trend database, check the TRENDTAG field in FC066.dbf (in the Exports folder of your project files). There should be a database entry for the trend block.
--Scanning drawing 1450301: Coal Silo Level Trend block Module 1,45,03 Block 7690 FC 66 is not referenced by any database trend tags.