Well, this was like looking for a needle in a haystack. I tried to use google to know if a block attribute referred to text or to a formula that made the text. The key is looking at the extension dictionary. If there is one, it has dictionaries inside of them and if one of the items in named “ACAD_FIELD” then… yes this attribute is de-referenced or aliased or abstracted by using a formula. I was usinging the attributes .Text property which gives you the RESULT of the field formula underneath. I was doing search and replaces and blowing away the formulas – which would have been best left alone. Now I can skip them.
The guy here about 8 posts down AFTER reading the code was my hero on this one. It was after about 20 google searches.