Problem with the PXI-6534 elimination change detection task

I ran into the following problem. I use a PXI-6534 and PXI-6602 with vb.net for detection with a timestamp of changes. My code works fine and I get data exactly as I want, the problem comes when I try to call the task.dispose function.

When I call him has, she throws an exception with error-200088 code, task does not exist. But the task is still stopped and I can run my code again and everything works fine. If I do not call the task.dispose, I get an error when I try to run my code again. The material seems to have left in an unknown state, and I have to restart my computer to get it back. (the MAX NOR even reset the 6602, he says only that the Council does not exist).

Interesting also is the exception thrown does not seem to be caught by the Try Catch method. The code traverses the Try Catch without any problem (step by step in the code anyway), but with the exception, the message box appears, either immediately or when coming out of the subroutine.

Also, I use TestStand 4.2 to call these functions, if that makes a difference.

Any help would be greatly appreciated! Its very frustrating that everything works and I get my data perfectly, but I can't run the code without exception popping up, and I can't seem to catch the exception.

Here is the code I use:

    Public Sub StartChangeDetect_UUT1()
        If myCDrunningTaskA Is Nothing Then
            Try
                ' Create the task
                uut1ChangeDetectTask = New Task()

                '************************ Create the digital input virtual channel alias
                'Assign ports to digital virtual channel
                uut1ChangeDetectTask.DIChannels.CreateChannel("Dev1/port0:3", "ChangeDetectUUT1", ChannelLineGrouping.OneChannelForAllLines)
                'uut1ChangeDetectTask.DIChannels.All.DigitalFilterEnable = True
                'uut1ChangeDetectTask.DIChannels.All.DigitalFilterMinimumPulseWidth = 0.000001
                uut1ChangeDetectTask.DIChannels.All.InvertLines = True
                uut1ChangeDetectTask.DIChannels.All.DataTransferMechanism = DIDataTransferMechanism.Dma

                'Assign ports to monitor for change detection, both rising and falling edges
                Dim rising As String
                Dim falling As String

                rising = "Dev1/port0:3"
                falling = "Dev1/port0:3"
                uut1ChangeDetectTask.Timing.ConfigureChangeDetection(rising, falling, SampleQuantityMode.ContinuousSamples, 4000000)

                'export change detect event to PXI backplane so we can get timestamps from timer.
                uut1ChangeDetectTask.ExportSignals.ChangeDetectionEventOutputTerminal = "/Dev1/PXI_Trig0"
                uut1ChangeDetectTask.ExportSignals.ChangeDetectionEventPulsePolarity = ChangeDetectionEventPulsePolarity.ActiveHigh

                'uut1ChangeDetectTask.Stream.Timeout = 20000

                ' Verify the Task
                uut1ChangeDetectTask.Control(TaskAction.Verify)

                ' Set up the data table
                Initializeuut1DataTable()

                ' Create the readers for the DI and the CI
                uut1ChangeDetectReader = New DigitalSingleChannelReader(uut1ChangeDetectTask.Stream)

                uut1CDCallback = New AsyncCallback(AddressOf uut1ChangeDetectCallback)
                uut1ChangeDetectReader.SynchronizeCallbacks = False
                ' Set up our first callback

                uut1ChangeDetectReader.BeginReadMultiSamplePortUInt32(-1, uut1CDCallback, uut1ChangeDetectTask)
                myCDrunningTaskA = uut1ChangeDetectTask

                'Set up Timer for time stamp

                uut1TimeStampTask = New Task()
                '****************set up PXI-6602 timer to get buffered change events.  ie capture timer output on  the PXI_Trig0
                'we can then correlate this timer capture buffer to the change detect buffer to get the time stamps

                uut1TimeStampTask.CIChannels.CreatePeriodChannel("Dev5/ctr0", "TimeStamp1", 0.0000001, 0.02, CIPeriodStartingEdge.Rising _
                             , CIPeriodMeasurementMethod.LowFrequencyOneCounter, 4, 4, CIPeriodUnits.Seconds)
                uut1TimeStampTask.CIChannels.All.CounterTimebaseRate = 20000000.0

                'Use exported change detect from 6534 board to take counter sample
                uut1TimeStampTask.Timing.ConfigureImplicit(SampleQuantityMode.ContinuousSamples)
                uut1TimeStampTask.CIChannels.All.PeriodTerminal = "/Dev5/PXI_trig0"
                'uut1TimeStampTask.CIChannels.All.DuplicateCountPrevention = False
                uut1TimeStampTask.CIChannels.All.DataTransferMechanism = CIDataTransferMechanism.Dma

                ' Set timeout
                'uut1TimeStampTask.Stream.Timeout = 20000
                ' Verify the Task
                uut1TimeStampTask.Control(TaskAction.Verify)
                uut1TimeStampReader = New CounterReader(uut1TimeStampTask.Stream)
                uut1TSCallback = New AsyncCallback(AddressOf uut1TimeStampCallback)

                uut1TimeStampReader.SynchronizeCallbacks = False
                uut1TimeStampReader.BeginReadMultiSampleDouble(-1, uut1TSCallback, uut1TimeStampTask)
                myTSrunningTaskA = uut1TimeStampTask

            Catch exception As DaqException
                ' Display Errors
                MessageBox.Show(exception.Message)
                uut1StopChangeDetection("C:\PT3771\TestResults\")
            End Try
        End If
    End Sub

    Private Sub uut1ChangeDetectCallback(ByVal result As IAsyncResult)
        Try
            'If runningTask Is ar.AsyncState Then
            If myCDrunningTaskA Is uut1ChangeDetectTask Then
                ' Read the available data from the channels
                Dim data As UInt32() = uut1ChangeDetectReader.EndReadMultiSamplePortUInt32(result)

                Dim b As UInt32
                For Each b In data
                    ' in TestData waveform Y axix is data, x axis is time 

                    uut1TestData.SetY(uut1ChangeDataIndex, b)
                    uut1ChangeDataIndex += 1

                Next b

                '' Set up a new callback
                uut1ChangeDetectReader.BeginReadMultiSamplePortUInt32(-1, uut1CDCallback, uut1ChangeDetectTask)
            End If
        Catch exception As DaqException
            ' Display Errors
            MessageBox.Show(exception.Message)
            uut1StopChangeDetection("C:\PT3771\TestResults\")
        End Try
    End Sub 'DigitalCallback

    Private Sub uut1TimeStampCallback(ByVal result As IAsyncResult)
        Try
            'If runningTask Is ar.AsyncState Then
            If myTSrunningTaskA Is uut1TimeStampTask Then
                ' Read the available data from the channels
                Dim data2 As Double() = uut1TimeStampReader.EndReadMultiSampleDouble(result)

                ' in TestData waveform Y axix is data, x axis is time
                Dim b As Double
                For Each b In data2
                    uut1TimeSum = uut1TimeSum + b
                    uut1TestData.SetX(uut1TimeStampIndex, uut1TimeSum)
                    uut1TimeStampIndex += 1
                Next b

                ' Set up a new callback
                uut1TimeStampReader.BeginReadMultiSampleDouble(-1, uut1TSCallback, uut1TimeStampReader)

            End If
        Catch exception As DaqException
            ' Display Errors
            MessageBox.Show(exception.Message)
            uut1StopChangeDetection("C:\PT3771\TestResults\")
        End Try
    End Sub 'CounterCallback

    Public Sub uut1StopChangeDetection(ByVal location As String)

        Try
            If Not (myTSrunningTaskA Is Nothing) Then
                uut1TimeStampTask.Dispose()
                myTSrunningTaskA = Nothing

            End If

            If Not (myCDrunningTaskA Is Nothing) Then
                uut1ChangeDetectTask.Dispose()
                myCDrunningTaskA = Nothing

            End If
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try

        uut1TestData.UpdatePointCount()
        uut1TestData.SaveToDisk("C:\PT3771\TestResults\uut1TestWaveFile.csv")
        uut1TestData.SaveToDiskBinary("C:\PT3771\TestResults\uut1TestWaveFile")
    End Sub 'StopTask

Joe,

Last updated. It seems that when the task.dispose is run, recalls seem to have called one last time. I took the call to the stopUUT1ChangeDetect in the two recalls (so eliminate it would not enforce a second time), and no exception was thrown.

Thanks for your help! Although if you'd still answer my question on the PXI-6534 Digital input filtering, I'd appreciate it.

Thanks again.

Thad

Tags: NI Software

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The other question that I found on the two sample VI and ripped version is on the news of sampling. The waveforms appear on digital Oscilloscope PXI-5112 always default to 10 cycles no matter how changed the sampling frequency and the number of samples. For example, if the frequency is 10 Hz, sampling frequency is 1000 Hz, and I put the number of samples to 10000. I'm supposed to get 10000/100 = 100 cycles. However, I could see 10 cycles no matter how, I changed. What should be the correct way to change the number of cycles?

Really appreiciate your help and advice. Thank you.

1 phase unit is in degrees (-180 to 180), no - pi pi.
2 standardize Waveform.vi always normalize your amplitude of the signal. You can remove it to use your desired amplitue, but must make sure that it is not above 5412 spec.

I have a problem with the DVD drive not detected on Windows 7.

I built a new PC (I've built a few of them). This time is not considered my ASUS BD player with Windows 7 DVD burner. It is not in either Device Manager just do not at all recognized. The BIOS for the ASUS P9X79 of luxury see the SATA drive without problem. Sometimes after restarting the BD Player looks and functions perfectly, but when the computer goes to sleep or shuts down is usually not there when it is restarted. Please help me solve this problem :-)

Original title: optical drive not recognized...

Hello

Please contact the Microsoft Community.

You have a problem with the driver DVD being missing on the computer. It can be difficult when something that is important to you does not work as expected. It's pretty simple and we're here to help you solve the problem. We work as a team and get this sorted out.

Please answer these questions-

(1) that you get an error message or error code?

(2) did you have performed the steps in troubleshooting?

(3) have you made changes on the computer before the show?

I would like more information about the issue.

Method 1-

I wish that you are running the fixit-

Hardware devices do not work or are not detected in Windows

http://support.Microsoft.com/mats/hardware_device_problems/en-us

Method 2-

Note: Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems can occur if you modify the registry incorrectly. Therefore, make sure that you proceed with caution. For added protection, back up the registry before you edit it. Then you can restore the registry if a problem occurs.
Back up the registry - http://windows.microsoft.com/en-US/windows7/Back-up-the-registry

I would have you look at the article-

Your CD or DVD drive is missing or is not recognized by Windows or other programs

http://support.Microsoft.com/kb/982116#top

Let us know if you have other questions about Windows in the future. We will be happy to help you. We at Microsoft, strive for excellence and provide our customers with the best support.

Thank you.

Satellite U300-13U - iTunes has detected a problem with the audio configuration

Please can someone help me? I have a laptop U300-13U and that you have installed iTunes on it. However, when I open iTunes I get an error message saying 'iTunes has detected a problem with the audio configuration and may not play correctly' which is an understatement - it does not at all!

I uninstalled, reinstalled iTunes and Quicktime, but in vain. I have searched and exhausted the iTunes support boards but have nowhere either. The sound is fine as I can read CDs with no problems at all. The only suggestion I can get is that there may be a problem with the audio device magnet is not Apple and vice versa.

Does anyone have AN idea at all as to what might be going on here? I'm completely out of my depth, I'm just a simple girl who wants to play his music!

Thank you so much.

Hello

I don t use iTunes so I m not an expert player but first of all, you must give us some important information:
-What operating system do you use?
-Are you using the factory settings (Toshiba Recovery disk) or your own version of Windows
-Do you have the yellow exclamation marks in Device Manager?

OK, iTunes says that there is an audio configuration problem so do you trying to update the audio driver? If this isn't the case, you should try it.
See the Web from Toshiba site for an update and see what happens. Then validate your result:
http://EU.computers.Toshiba-Europe.com-online decision-making supported Downloads & => Download drivers

Welcome them

Problem with the PXI-6534 elimination change detection task

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