Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!rutgers!rochester!pt.cs.cmu.edu!cat.cmu.edu!ns From: ns@cat.cmu.edu (Nicholas Spies) Newsgroups: comp.sys.mac.hypercard Subject: Re: 2.0 WishList (was Re: Do integers stop at 2^30?) Keywords: FExists(), VMounted() Message-ID: <3078@pt.cs.cmu.edu> Date: 23 Sep 88 03:22:32 GMT References: <3047@pt.cs.cmu.edu> <17439@apple.Apple.COM> <1516@oakhill.UUCP> Sender: netnews@pt.cs.cmu.edu Distribution: na Organization: Carnegie-Mellon University, CS/RI Lines: 15 Is there a way to tell whether you can evaluate the contents of a field (with "the value of") to avoid getting the error dialog when "the value of" fails? In general, HyperCard errors of all types should be trappable, instead of giving an unwelcome dialog warning. How about an "error" system message, so an "on error" handler could be written to handle illegal user inputs gracefully. The system does it already, in some sense, to provide the dialog boxes... -- Nicholas Spies ns@cat.cmu.edu.arpa Center for Design of Educational Computing Carnegie Mellon University