Cannot insert (video loop while VI)

Hi all

I'm building a VI to count the fringes of an interferometer using a video camera of Thorlabs 1645C (with the VI UC480). The intention of VI is to count time passing a certain pixel fringe and to do this, I need a counter threshold. As can be seen in the screenshot, video array is first reduced to a single pixel (using a slider) to get a 256-bit integer that indicates the levels of gray. This gray scale should trigger an account each time it passes a certain value, but the threshold detector resets whenever the grayscale value dips below the threshold. I tried to use while loops (and other loops of types), but in these cases the video play not at all, making it useless VI. When you use the other fixtures, however, as one set, the count will be just continue to rise as long as the grayscale value is greater than the given threshold, or it is not at all.

After a week and a half of trying, I am ideas. Could someone please help?

Next time, I have a question, I'll post an excerpt, but since this VI needs a specific camera, run, I was thinking that showing the complete VI would not be useful.

I think I found the solution well! (It seems to work because as far as I know)

It turns out that I needed a bigger? block instead, in which the feedback loop has a high value for an iteration unique 'loop' (which is strange, because I have used almost the exact same set-up, but instead of the threshold detector VI, I used a Boolean value, which has been without success).

I added a screenshot because it seems more convenient than adding a VI (due in part to compatibility etc.)

Thanks for all the comments

Tags: NI Software

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    at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:413)

    at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:94)

    at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:161)

    at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:136)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    to weblogic.servlet.internal.WebAppServletContext$ ServletInvocationAction.wrapRun (WebAppServletContext.java:3715)

    to weblogic.servlet.internal.WebAppServletContext$ ServletInvocationAction.run (WebAppServletContext.java:3681)

    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)

    at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)

    at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)

    at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)

    at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)

    at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)

    at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)

    Caused by: java.sql.SQLException: connection has already been closed.

    at weblogic.jdbc.wrapper.PoolConnection.checkConnection(PoolConnection.java:58)

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    at oracle.adfinternal.controller.savepoint.SavePointDBPersistManager.insertSavePoint(SavePointDBPersistManager.java:221)

    at oracle.adfinternal.controller.savepoint.DBSavePointManagerImpl.storeSavePoint(DBSavePointManagerImpl.java:127)

    at oracle.adfinternal.controller.savepoint.SavePointManagerImpl.storeSavePoint(SavePointManagerImpl.java:301)

    at oracle.adfinternal.controller.savepoint.SavePointManagerImpl.createAndStoreSavePoint(SavePointManagerImpl.java:257)

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    at oracle.adfinternal.controller.savepoint.SavePointManagerImpl.createSavePoint(SavePointManagerImpl.java:116)

    at view.security.errormanagement.ManageErrorsMB.saveTaskFlow(ManageErrorsMB.java:213)

    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)

    at java.lang.reflect.Method.invoke(Method.java:611)

    At the bottom of the stack, this statement ""caused by: java.sql.SQLException: connection has already been closed. ' that intrigues me, but why this error occurs after a few days or after a particular number of connections or access to the application. "

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