ActiveX controls disappear when VI is loaded in a Sub-Panel with Start Modal Dialog usage

Hi,
I have a subpanel in a VI (VI1) in which another VI (VI2) is loaded. VI1 is used as a module for an Action step in TestStand. VI2 has ActiveX controls like ExpressionEdit and Adobe PDF reader etc. VI1 loads VI2 in a sub-panel and calls Start Modal Dialog.vi. I have set 'Show front panel when called' to true for VI1 so that the VI pops up when the sequence is run. When the sequence runs and when the Start Modal Dialog VI is called from VI1, all ActiveX controls in VI2 (loaded in the sub-panel) disappears. Here is the screenshot of the frontpanel of VI1 when the sequence is run:
This problem occurs in TestStand 4.2.1, TestStand 2010 and TestStand 2010 SP1 (as far as I have tested. May occur in older versions too). In the attached file, VI1 is 'ExprEdit Test.vi' and VI2 is 'SubpanelLoad.vi'. The attached sequence is developed in TestStand 2010 SP1.
How can this issue be solved?
Thank you,
Ganesh Kumar
Solved!
Go to Solution.
Attachments:
Subpanel Load ExpressionEdit problem.zip ‏23 KB

Hi,
An update on this issue: I tried changing the order of loading the VI in the SubPanel and the start modal dialog. I called start modal dialog and then loaded the VI (VI2) in the SubPanel. When I ran the sequence, the activeX controls did not disappear (I was pretty sure that the ActiveX controls in VI2 would not disappear since I am calling Start Modal Dialog before loading the VI in the Subpanel). Then I just changed the sequence of operations back to the previous order (loading the Subpanel with the VI and then calling the Start Modal Dialog). When I ran the sequence, the activeX controls where still displayed. But when I ran the sequence with the VI1 backup (that I had taken before making all these modifications) the activeX controls were not displayed. I a nutshell, I now have 2 versions whose codes are the same. But when I run the sequence with action steps for these VIs, the activeX controls disappear when the unmodified backup VI runs and does not disappear when the modified VI is run. I have attached the files that I used along with the sequence file. The details are as follows:
ExprEdit Test (Not Working).vi - The unmodified backup VI for which the ActiveX controls disappear.
ExprEdit Test (Working).vi - The modified VIs in which the ActiveX Controls do not disappear (But same code as ExprEdit Test (Not Working).vi).
ExpreEdit Test.seq - The sequence file containing 2 action steps one each for theabove mentioned VIs.
SubpanelLoad.vi - The VI that contains activeX controls and is loaded in the SubPanel.
Note that the sequence is created in TestStand 4.2.1.
Thank you,
Ganesh Kumar
Attachments:
Subpanel Load ExpressionEdit problem.zip ‏36 KB

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