as per latest release notes (I’m not sure if I should be editing the wiki)
Evaluate DAT v() functions - The functions that get other cells in the Evaluate DAT - v(), vr(), vc(), vrc() functions now return floats only. A new family of functions vs(), vsr(), vsc(), vsrc() will return string values, similar to if() and ifs(). Not completely backwards compatible, but unlikely to affect anyone!