"write plot to jpeg" always stores data of previous run

[schorsche]

Please have a look at the vi attached below: Although I'm using a sequence, the output-jpeg file always contains the date (jpeg) from the PREVIOUS run of the program.
What am I getting wrong here?
Thanks for any answers!

[altenbach]

It works just fine here (LabVIEW 7.0).
The jpeg always contains the data of the newest run and the file date is also correct.

(Your VI is actually broken, so I added a few points manually).

Please provide more details, e.g. are you calling this as a subVI? I doubt it would help, but you could also try to set the picture for synchronous display (right-click..advanced..synchronous display).

[schorsche]

Hello, yes you're right I just copied a small part of my program. I'm reading samples from niScope and build up an array with them. I then copy the array into a cluster and hand it to the plot function (as you can see in the vi already posted).
I'm not calling this function in a subvi.
It seems as though the values of the previous run get copied to the jpeg file.
Anyway I'll try to figure it out and come back to you shortly!
Cheerio

[schorsche]

Hello again. I found out what it is: The front panel has to be open when the values change. I found this information in the help file. However it also says:
" If you do not want to display the front panel but want the image to reflect value changes, wire a Property Node to any front panel terminal on the block diagram of the VI for which you want to create a front panel control image"
I don't quite understand how I should do this in my example code, i.e. where to wire it to.
Can you please help?
Thanks a lot

[LouisP]

Hello Schorsche,

I would drop the property node at the begining of the sequence strucure. So that the date is updated initially.

Kind Regards

LouisP
Applications Engineer
NI-UK