Error, in Getting started with Labview. Chapter 3, part 4.

Hi.
Still struggling on, trying to find the time to work through the "Getting Started with LabVIEW" document.
Only 19 days left to go, and I'm still only in chapter 3!...
Right. In the "Saving Data When Prompted by a User" exersise, part 4...
4.   Right-click the Signals input of the Write To Measurement File
      Express VI and select Insert Input/Output from the shortcut menu to
      insert the Comment input.
Problem is, that option is greyed out, so not available!...
I did what the instructions said, I right clicked on the "Signals" input, and it doesnt do what it says on the tin!
Any pointers?   Please don't mention search the help, I've crashed the entire LV environment 3 times now, trying to search for something in there. It's OK if it finds someting, but it seems to bomb at times, when there is some ambiguity when searching.
Also, I won't be able to do anyting with any replies for a day or two, as I have to go up country to a customer, and mess about with hot oil, high volts, and lots of RF. It never ends.   (I've still got the day job to do, while trying to fight my way through this "evaluation". 30 days of "Use" would be better, than 30 calendar days for some of us.)
Regards.
Dave Baxter.
Technical Manager: AR-UK Ltd.
AR United Kingdom
OK... Who let the smoke out?

Hi Dennis, and everyone else..
That is not how it looks when first dropped on the BD. On my machine, it is partialy expanded by default, after you clear the Configure dialog that pops up ocupying most of the screen.
Again, if it makes a difference to the way the Right Click shortcut menu works, it should be documented in the Getting Started document, especialy as it seems to be a critical point.
OK, explain this...
I've just rubbed out the save to file VI, cleaned up the broken wires etc, and then planted a new one on the BD. Once I cleared the Configure dialog that covers up most of the screen before you see it the first time, the VI was partialy expanded. I forget the exact list, but "Signals" was not at the top.
I did *EXACTLY* the same again, deleted it, cleaned up, and then planted a fresh new one. That DID appear that time with nothing but the "Signals" item showing, and two down caretts below that, indicating more items.
So......
Why the different behaviour each time, on the same BD, in the same session. Some underlying working data not being correctly initialised when invoked? Of course, that never happens, right? ('C' programmes eh?)
Trying some more, it seems the behaviour loosley depends on just how close to the edge of the While loop grey border you place it. Odd. I have a 1280x800 screen to play with, and a 1280x1024 second screen I use for the Getting Started document. That is the absolute maximum I can have, due to hardware limits.
I also find, that if you fully expand the "Write to Measurement File" VI block, then fully collapse it, then expand it again, all the items in that list have changed places! Why?
I had noticed earlier that there is no uniformity in the layout of even the items common to many if not all VI blocks (error in, and error out to name but two) Sometimes one is above the other, sometimes the other way round, sometimes they are not even ajacent to each other. Has that been done as a source of minor ammusement or something?
Talking to another colegue here, who just wandered in to see how I was getting on with this. Seems he also has tried the introductory entry into LV (V8.something) in the past. But he too, found too many things that behaved differently from one time to another, so abandoned it as a lost cause, then decided to learn how to use Visual Basic with NI-GPIB IO instead. Not without issues either he said, but at least it all behaves exactly the same, each and every time.
End of the day now...
Regards.
Dave B.
OK... Who let the smoke out?

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fft_all.png ‏52 KB

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Attachments:
GreatestCommonDivisor.zip ‏8 KB
CGen Files.zip ‏71 KB

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