I don't understand this: if I use \overrightarrow in certain places (both in-line and display modes) then the document compiles error free. If I use it in other places I generate a ton of errors, including some that are not directly related to the symbol.
At locations where the errors are generated, replacing \overrightarrow with \tilde solves the compilation problem. I will now try, one-by-one, to replace the \tilde with \overrightarrow and see if I can isolate the problem. How strange! Has this come up before for anyone else? Rich -- Dr. Richard B. Shepard, President Applied Ecosystem Services, Inc. (TM) <http://www.appl-ecosys.com>
