Thanks David,
I did some more digging: I think the problem is not at the Compute end, but rather at the DatasetTimestep end. Compute needs to compute something from something it does not appear to get. So...going upwards: DatasetTimestep is a macro that is called in various places. The imputs are a bunch of receiver objects. The transmitters (to these receivers) are all getting data from a DXLink object. DXLink documentation state that it is an application... If all of this is right, and my thinking is right (a long shot), is there a way to find which application is suppose to feed the DXLink ?? Thanks again, Éric At 10:28 AM 25/10/00 -0600, 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
