Did the unflatten from string vi change from V6 to V8?

[jabdo56]

Thanks for everyone's input!

 Below is the cluster I'm using for my Type. Next to it is the load file code. This was inherited from the LV 6.1 code.

 The read file VI is a hybrid called Read File+ (string).vi, but at the heart of it is Read From Binary File.vi.

[Darin.K]

There is still the possibility that the file is written with Convert EOF set to true so check that.  Simply set it to true for the read if you do not have the old code which wrote the data.

A second possibility is that the first four bytes are actually the length of the string, you can try skipping the first four bytes and see if you can unflatten the data.

You could post one of the strings and we could test it as well.

[jabdo56]

Darin.K

I've attached three files:

1. GaN-4.iqts -- this is the LV 6.1 file containing a string that represents three bundled elements.

           - Acquired Waveform (2D array of singles)

           - Waveform Data (2D array of doubles)

           - Rate Window Spectrum (waveform graph, 2D double)

           Below is a diagram showing the bundle.

2. GaN-4.iqts.jpg -- this is a screen shot of what the waveform data looks like when loaded into the LV 6.1 app.

                               Note: Waveform Data is displayed in the Averaged Waveform graph.

 

3. GaN-4.iqts.txt -- this is exported waveform data from the LV 6.1 app.

                              The three elements follow the header infomation and are labled:

                             - Acquired Waveform (2D array of singles)

                             - Averaged Waveform, same as Waveform Data (2D array of doubles)

                             - Rate Window Spectrum (waveform graph, 2D double)

Your help resolving this would be greatly appreciated!

[Darin.K]

Hopefully words work and I do not have to post a picture.  The Rate Window Spectrum is actually a cluster of three elements called the Waveform Data Type: t0 (double) dt (double) and Y (1-d array of double).  No problems for me reading the data you posted in LV12 using that data type.

[jabdo56]

So you were able to reconstitute the graphs from the string?

[Darin.K]

Yes. The two arrays were easy, when you have stared at as much binary data as I have you recognize things like the double representation of 1 pretty quickly so I figured out the WDT cluster I described for the waveform.

[rolfk]

---

@jabdo56 wrote:
So you were able to reconstitute the graphs from the string?

---

This question is actually almost ironic, although you probably didn't mean it to be. That and the remark of Darin that he hopes he won't need pictures for you to understand.

It's all nice and good to post pictures of code and MB sized data files, but without the actual VI code you leave a lot of detective work to whomever is inclined to try to help you.

[Darin.K]

---

@rolfk wrote:

It's all nice and good to post pictures of code and MB sized data files, but without the actual VI code you leave a lot of detective work to whomever is inclined to try to help you.

---

Holy crap, the detective work was the easiest part....

So I figured out the old timestamp instead of DBL in the waveform thing easy as pie.  Kids come running in so left arm goes into blocking position.  With one hand I type out a quick post, attach my very simple VI and try to submit:  Error, attached file does not match type or some such nonsense.....

No problem, I'll post a snippet, it is very simple code.  With one hand: Select All, Create Snippet.  Now there is only one piece of information the snippet needs to convey, the contents of a cluster.  We know what happenned now:  The snippet image contains a blank cluster....

Net result, I hope that words worked for the OP, and luckily for all of us my kids were in the room so I kept the four letter ones in my head...

[jabdo56]

I've attached the code and two example files.

[jabdo56]

Darin.K and rolfk:

I've posted code and test files to exhibit the problem. I would greatly appreciate you showing me what you did to make it possible to unflatten the older data file.

Thanks,

~jim