[CE] DWG:could not find SHX font

Any ideas how to check which lines are missing shp symbols when opening a DWG file? The message "could not find SHX font [dgnlstyle]" is not very informative as I would like to know which line was not correctly converted to DWG. The missing symbols are replaced with dots or question marks but it is only visual indicator or is there some way to actually scan and find those broken lines?