LV 6.1, 3D Surface Graph sometimes collapses (doesn't work stably); plus blocks use of remotely controlled panel by LV run-time engine (error #26:"window.cpp", line 11518

[mjoler]

1) "3D Surface Graph" does not work stably; sometimes it changes its properties (e.g. plot style) without me doing anything prior to that; a couple of times it lost a complete sense so that I had to delete the graph and install it again

2) I tried to remotely run a VI which contains a 3D Surface Graph in it. It turns out, the use of the "3D Surface Graph" somehow blocks the remote control over the panel. As a result of that, I got the following error message: Error #26: "window.cpp", line 11518 (with LabVIEW version 6.1).

3) Is it possible to plug into the 3D Surface Graph a few plots at
the same time since there is a built-in control "plot number" (somehow by bundling them up or putting into an array - I tried both but didn't work) or it can be done merely by use of 'case' structure preceding the Graph, where case structure decides which plot to pass into the 3D graph?

[Matthew C]

Hello mjoler,

Thank you for contacting National Instruments.

The following example will show you how to plot multiple 3D plots on a single 3D graph. Modeling your VI after the example may also alleviate the instability that you have been experiencing.

http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B123AE0CBA19111EE034080020E74861&p_node=DZ52038

As far as the error you are receiving, it's difficult to say what could be causing this. ActiveX controls embedded on a front panel sometimes do not display on a remote client because they draw and operate almost completely independent of LabVIEW. If possible, try remotely controlling your VI with a client computer that has a complete installation of LabVIEW. The error could also be a bu
g. Try downloading the evaluation version of LabVIEW 7.0 from http://www.ni.com/labview. By doing this, we can determine if it is a bug in the older version that has been fixed in the latest version.

Let me know how this goes.

Matthew C
Applications Engineer
National Instruments

[mjoler]

Hi, Matthew,

Thanks for the response to my question. The example you reffered to is very instructive and I will follow that approach trying to alleviate the instabilities I've experienced.
I did run a VI from a machine that has LV installed, but how 'complete' that installation is, I am not sure how complete it has to be (i.e. what is considered 'complete'; maybe it's not a most comprehensive installation, but certainly it had the core part installed). I will further try to download the lates version of the Run-time Engine and see if it helps anything.
Finally, I did already download the evaluation version of the LV 7.0, trying to test stability of my VI under 7.0. It still crashed multiple times. However, I read a comment of one of your NI colleagues th
at concurrent presence of LV 7.0 and some older version of LV on the same machine can work unstably. (I admit that I did not remove the older version just to test this VI under 7.0. Maybe even LV 7.0 does not resolve the issue about 3D Surface Graph?)

Thanks. I'll keep you posted if I observe anything new about this.
Miro