I don't think it is the expression that is missing, but rather the first input to Compute is missing, either a Null object is being passed or the first input is not connected to anything.
I guess I would first make sure the input is connected to an output of another module and then trace the network upward to see where the data is coming from, and make sure it is being imported or generated correctly. Use the Print module in Debugging with option set to "r" or "rd" to make sure the object (or data) looks okay. Jeff On Wed, 25 Oct 2000, David Thompson wrote: > Eric, > > This is going to be next to impossible for anybody to help you with. > The expression supplied in the Compute module does not exist, > therefore it doesn't know what to do. We could suggest some > expressions, but I hate to say that I'm positive we'd never get it > right. For example just try setting the expression to "a" w/o the > quotes. > > David > > >Hi, > > > >I am a new DX user, I got to it 2 days ago. > >I have to use a fairly complex .net program that somebody else wrote in > >3.1.4, I am using 4.1.0 on a Sun box. I have next to no knowledge of DX. > > > >The program does not run properly, I keep getting the following error in > >the Message Window: > > > >------------------ > >ERROR: DatasetTimestep: EnclosingTimesteps: SecondsDifference: Compute: Bad > >parameter input 0 used in expression and supplied as NULL > >------------------ > > > >I can get to the Compute tool in the SecondsDifference.net macro, but I'm > >stuck there. > > > >Any help appreciated, thanks in advance. > > > >Éric > > -- > ............................................................................. > David L. Thompson The University of Montana > mailto:[EMAIL PROTECTED] Computer Science Department > http://www.cs.umt.edu/u/dthompsn Missoula, MT 59812 > Work Phone : (406)257-8530 > ---------------------------------------------------------------------- Jeff Braun Geophysics Dept. mailto: [EMAIL PROTECTED] Montana Tech (406) 496-4206 1300 W. Park St. Butte, MT 59701
