The error types in this file have not yet been converted to work with the error browser.
DBDOC is telling you that a reference to a blank tag in a Process Portal B graphic was found. The tag is defined so that you can track it down reasonably easily.
--Scanning graphic Y01A14CORD.M1 Tagatom PV/UNITS:S used with blank tag - defining BLANK_TAG_001 in YW_value_Basic included by YW_value02EU.