Instrumentation Driver Developer Guide Documentation Error p9-44 Ivi_UnlockSession

The source code as listed causes subsequent calls to attribute methods to lock up the development session. Which solution is preferable? Remove the Ivi_UnlockSession statement or add a Ivi_LockSession statement at the top of the method?

Hello Larry,
This looks like a mistake in the DDG Manual. The recommendation would be to add Ivi_LockSession at the top as in the following code (from the latest fl45 source):
ViStatus _VI_FUNC fl45_ConfigureHold (ViSession vi, ViBoolean holdEnable,
ViInt32 holdThreshold)
ViStatus error = VI_SUCCESS;
checkErr( Ivi_LockSession (vi, VI_NULL));
viCheckParm( Ivi_SetAttributeViBoolean (vi, VI_NULL, FL45_ATTR_HOLD_ENABLE,
0, holdEnable), 2, "Hold Enable");
if (holdEnable)
viCheckParm( Ivi_SetAttributeViInt32 (vi, VI_NULL, FL45_ATTR_HOLD_THRESHOLD,
0, holdThreshold), 3, "Hold Threshold");
checkErr( fl45_CheckStatus (vi));
Error:
Ivi_Un
lockSession (vi, VI_NULL);
return error;
If you are interested in driver development, I would recommend downloading some drivers from our website (http://www.ni.com/idnet) and walking through them -- we provide the source to many complete drivers.
Sincerely,
Jeremiah Cox
Applications Engineer
National Instruments
http://www.ni.com/ask

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Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?

Being waited on to log on... how flattering
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Message Edited by LuisG on 05-19-2010 10:43 AM

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That's great, Mike, you're welcome. I'm glad it's working for you. Thanks for letting me know.
-Scott
Mike Friesen wrote:
I'm sorry you were right.. I tried it and everything works... thanks..
Mike
"Scott Ellis" <[email protected]> wrote in message
news:[email protected]...
Hi Mike,
I hear what you are saying and I believe you. But the error you describedis the known issue related to Internet access
(down to the exact line numbers in the stack trace). Is it possible yourconnection was down last time you attempted
hot-deploy?
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Now my curiosity is piqued so I hope you'll let me know either way.
Best Regards,
Scott Ellis
BEA Systems
Mike Friesen wrote:
yes..
"Scott Ellis" <[email protected]> wrote in message
news:[email protected]...
Can you please try something for me? Paste the following URL into abrowser:
http://java.sun.com/dtd/application_1_3.dtd
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Scott
Mike Friesen wrote:
Actually, my computer does have internet access, so I don't think that
is
the problem.
Mike
"Scott Ellis" <[email protected]> wrote in message
news:[email protected]...
Hi Mike,
I would bet that you are working on a machine that doesn't have
Internet
access, correct?
The problem is that the EBCC is trying and failing to access the J2EEapplication descriptor
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in
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<!DOCTYPE application PUBLIC '-//Sun Microsystems, Inc.//DTD J2EEApplication 1.3//EN' 'file:///application_1_3.dtd'>
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Thanks,
Scott Ellis
BEA Systems
Mike Friesen wrote:
I am going through creating a New Portal from WebLogic Portal 7
Development
Guide and I am running into the following problem.
After completing Step 2: Create the New Portal, when I try to Hot
Deploy
the
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Adding file:
C:\bea\user_projects\myNewdomain\beaApps\portalApp-project\application-sync\
webapps\PortalWebApp\webflow-extensions.wfx to sync list.
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<!ELEMENT connector (#PCDATA)>

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Ideas?
Solved!
Go to Solution.

Are you sure about that? I just tried calling these functions in the Interactive Execution window without errors (the destination file wasn't there before the call and has been created without errors):
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Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?

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Instrumentation Driver Developer Guide Documentation Error p9-44 Ivi_UnlockSession

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