nifgen_standard_function.py giving Windows Error 0xc06d007f

[emtagg]

I'm running the nifgen_standard_function.py example and am unsure as to why it's producing this output:

File "C:\Users\att\Documents\nimi-python-master\nimi-python-master\src\nifgen\examples\nifgen_standard_function.py", line 47, in <module>
    main()
  File "C:\Users\att\Documents\nimi-python-master\nimi-python-master\src\nifgen\examples\nifgen_standard_function.py", line 33, in main
    _main(sys.argv[1:])
  File "C:\Users\att\Documents\nimi-python-master\nimi-python-master\src\nifgen\examples\nifgen_standard_function.py", line 29, in _main
    example(args.resource_name, args.option_string, args.waveform, args.frequency, args.amplitude, args.offset, args.phase, args.time)
  File "C:\Users\att\Documents\nimi-python-master\nimi-python-master\src\nifgen\examples\nifgen_standard_function.py", line 10, in example
    with nifgen.Session(resource_name=resource_name, options=options) as session:
  File "C:\Users\att\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\nifgen\session.py", line 3067, in __init__
    self._vi = self._initialize_with_channels(resource_name, channel_name, reset_device, options)
  File "C:\Users\att\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\nifgen\session.py", line 4091, in _initialize_with_channels
    error_code = self._library.niFgen_InitializeWithChannels(resource_name_ctype, channel_name_ctype, reset_device_ctype, option_string_ctype, None if vi_ctype is None else (ctypes.pointer(vi_ctype)))
  File "C:\Users\att\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\nifgen\_library.py", line 444, in niFgen_InitializeWithChannels
    return self.niFgen_InitializeWithChannels_cfunc(resource_name, channel_name, reset_device, option_string, vi)
OSError: [WinError -1066598273] Windows Error 0xc06d007f

I have downloaded the NI-FGEN (version 20.0.0) driver from the National Instruments website and am using python module nifgen=1.3.2.
Any tips on how to fix the error would be appreciated!

[sbethur]

@emtagg, what are the arguments you're passing to the example script? If you're running the example on real hardware, please describe your hardware setup.

[emtagg]

Hi @sbethur, thanks for getting back to me. I'm using the PXIe-1078 chassis with a PXIe-8880 controller.
I have also inserted the PXIe-5423 waveform generator card into slot 9 of the DAQ. In the NI MAX app, I named the PXIe-5423 (2CH) card "PXI1Slot9_AWG".
In the example, the only code I changed was in the _main function, which now looks like this (default resource name arg was modified):

def _main(argsv):
    supported_waveforms = list(nifgen.Waveform.__members__.keys())[:-1]  # no support for user-defined waveforms in example
    parser = argparse.ArgumentParser(description='Generates the standard function.', formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser.add_argument('-n', '--resource-name', default='PXI1Slot9_AWG', help='Resource name of a National Instruments Function Generator')
    parser.add_argument('-w', '--waveform', default=supported_waveforms[0], choices=supported_waveforms, type=str.upper, help='Standard waveform')
    parser.add_argument('-f', '--frequency', default=1000, type=float, help='Frequency (Hz)')
    parser.add_argument('-a', '--amplitude', default=1.0, type=float, help='Amplitude (Vpk-pk)')
    parser.add_argument('-o', '--offset', default=0.0, type=float, help='DC offset (V)')
    parser.add_argument('-p', '--phase', default=0.0, type=float, help='Start phase (deg)')
    parser.add_argument('-t', '--time', default=5.0, type=float, help='Generation time (s)')
    parser.add_argument('-op', '--option-string', default='', type=str, help='Option string')
    args = parser.parse_args(argsv)
    example(args.resource_name, args.option_string, args.waveform, args.frequency, args.amplitude, args.offset, args.phase, args.time)

[sbethur]

The issue is probably in the driver runtime that the python API is calling into or with the hardware. You can try a couple of things to narrow down the issue a bit more:

• Run the example on simulated hardware by setting -op argument to Simulate=1, DriverSetup=Model:5423 (2CH);BoardType:PXIe'
• Verify Self-Test of the hardware completes successfully in MAX

For support with driver runtime and/or hardware issues, please open a request through the NI support portal at ni.com.

[marcoskirsch]

We know little about your setup.

run
python -c "import nifgen; nifgen.print_diagnostic_information()"

Also, confirm you can self test the instrument in MAX, and that you can use it from InstrumentStudio.

If you have access to LabVIEW, C compiler, or C#, it would also be helpful if you can use the instrument from there.

Essentially, we want to know if this is a bug in our Python binding, the driver runtime, or a hardware problem.

Thanks!

[marcoskirsch]

@emtagg were you able to try it?

[tobiasgordon]

I ran into the same error yesterday using NI-DCPower 21.3, Python 3.9.7 (the "Windows installer 64-bit" exe installed from https://www.python.org/downloads/release/python-397/), and nidcpower 1.4.1. I do have python 2.7 installed on the system.
The error occurs with something as simple as

python3 -c "import nidcpower; session = nidcpower.Session(resource_name='PXI1Slot4');"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\Administrator\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\nidcpower\session.py", line 5832, in __init__
    self._vi = self._fancy_initialize(resource_name, channels, reset, options, independent_channels)
  File "C:\Users\Administrator\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\nidcpower\session.py", line 6145, in _fancy_initialize
    return self._initialize_with_independent_channels(resource_string, reset, option_string)
  File "C:\Users\Administrator\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\nidcpower\session.py", line 6660, in _initialize_with_independent_channels
    error_code = self._library.niDCPower_InitializeWithIndependentChannels(resource_name_ctype, reset_ctype, option_string_ctype, None if vi_ctype is None else (ctypes.pointer(vi_ctype)))
  File "C:\Users\Administrator\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\nidcpower\_library.py", line 334, in niDCPower_InitializeWithIndependentChannels
    return self.niDCPower_InitializeWithIndependentChannels_cfunc(resource_name, reset, option_string, vi)
OSError: [WinError -1066598273] Windows Error 0xc06d007f

The error occurs whether I use a real of invalid device name.

Diagnostic info:

python3 -c "import nidcpower; nidcpower.print_diagnostic_information()"
OS:
    Name:      Windows
    Version:   10.0.19042
    Bits:      64
Driver:
    Name:      NI-DCPower
    Version:   21.3.0.338
Module:
    Name:      nidcpower
    Version:   1.4.1
Python:
    Version:   3.9.7 (tags/v3.9.7:1016ef3, Aug 30 2021, 20:19:38) [MSC v.1929 64 bit (AMD64)]
    Bits:      64
    Is_Venv:   False
    Installed Packages:
        nitclk==1.4.1
        niscope==1.4.1
        nidcpower==1.4.1
        hightime==0.2.1
        setuptools==57.4.0
        pip==21.2.3

[sbethur]

Since a 2nd instance of this issue was reported, I created an issue to track it: #1663. I'm locking this discussion thread, further discussion will happen in the issue.