Problem: Select ActiveX Class > Browse... hangs LabVIEW (not responding)

[Mark H]

Can anybody help with this problem...

When I right click either an "Automation Refnum" (front panel) or an "Automation Open" and click "Select ActiveX Class > Browse..." LabVIEW just hangs and becomes "(not responding)".

Strangely - if I drop an ActiveX container onto the front panel and right click this selecting "Insert ActiveX Object..." then LabVIEW lists a healthy selection of objects - which indicates that not everything about ActiveX is broke.

The crash/hang when trying to browse for ActiveX Classes occurs with all three versions of LV I have installed 7.0, 7.1 & 8.0.

Can anyone help - please.

Mark.

[Ray.R]

I see the same thing with LV8.2. 

Don't click browse a second time...  It is actually populating a list of ActiveX classes, so you have to wait a bit (quite a bit) longer for the brosw to become populated...  It took the time that I wrote the 1st two sentences (approx 1 minute - I type slow this early in the morning).

Yes, I see this too.  If you click twice on the browse and get the LV Not Responsive, just wait "quite a bit", it should recover..  That's what happened to me.  🙂

RayR

[Ray.R]

I tried it again after to get two screen captures (one with the LabVIEW Not Responsive message), unfortunately it is much faster when browsing after the initial search.  Probably because a list was populated somewhere.  So it's slow the first time...   😉

Message Edited by JoeLabView on 11-01-2007 07:23 AM

[Mark H]

Hi Joe,

Unfortunately this isn't the problem on my system - I could wait hours and nothing will happen, and there is no hard drive activity which indicates there is no searching/populating going on at all - just left hanging.

Mark.

[Ray.R]

You mean you've tried it more than once and it stays frozen?

If so, that IS strange...

Have you tried it within a blank VI?

RayR

[Mark H]

Ray,

Yes I've tried it several times for each of my 3 versions of LV, and right-clicking the "Refnum" control/constants and the "Automation Open" function - they all hang LV after clicking "Browse..." - not even a civilised timeout.

It does the same, whether it is existing code or a blank VI.

With existing code like the Examples: Write Table to XL.vi - right clicking shows two classes above the "Browse" (like MRUs), but if the existing tick-selected class is changed, the diagram shows broken-wires, even when re-ticking the original selected class - which seems to suggest that LV is still unable to look-up the properties and methods of the classes.

Mark.

[Mark H]

Update:

I resorted to uninstalling all three vesions of LabVIEW, and everything else from NI.

I then reinstalled LV 7.0 only, and proceeded to "Browse..." to select an ActiveX class/object from right-clicking an "Automation Refnum".

Ostensibly, I don't think that uninstalling-re-installing made any difference.

However - I inadvertantly left LV alone after right-clicking "Browse..." whilst I did some lunch time web-browsing, and low and behold the "Select Object from Type Library" dialog had eventually appeared.

I've retested the function and it seems to take about 9 minutes between clicking "Browse..." and the "Select..." dialog appearing - during which time the PC's processor and HDD show almost no real activity, and LV appears, and is reported as "(not responding)".

Any ideas, or similar experiences - anyone?

[AdnanZ]

Hi Mark,

Do you have any other application on that machine which can access the ActiveX servers (not the objects)? For example, in LabWindows/CVI, you can try Tools -> Create ActiveX Controller and see if you get the ActiveX servers over there.

[Mark H]

Hi Adnan,

Thanks for taking an interest.

I'm not aware if I've "any other applications which can access the ActiveX servers.." - but to be honest I wouldn't really know where to look. I'm quite profficient in my knowledge of PCs and straight-forward programming, but my knowledge of software technologies like ActiveX is quite limited.

Unfortunately I do not have LabWindows/CVI so I cannot look into the tools you mention.

Mark.

P.S. Different subject - I'm about to post a message regarding another issue regarding a big problem with the 3D effect graphics in LabVIEW (I would appreciate it if your or other NI support/applications engineers could look at this when I've finished posting it).

[AdnanZ]

Hi Mark,

At this point, I would recommend you get a rep from Microsoft involved. Another option which you could try is to reinstall the operating system.

If you need direct support from National Instruments, then visit http://www.ni.com/ask/.