Attribute NIRFSG_ATTR_DIRECT_DOWNLOAD for niRFSG (PXI5670) cannot be changed/gives errors- wrong attribute type?.

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Hi,

I have been trying to control our RFSG (PXI5670) which contains a PXI5610 upconverter and PXI5421 arbitrary waveform generator.  I wanted to use a specific waveform and accoring to the documentation under `Programming/Reference/ni-RFSG C function reference/ni-RFSG attributes/Arb/Data transfer/NIRFSG_ATTR_DIRECT_DOWNLOAD` you will see that "

For the PXI-5670, direct download is always disabled. For all other devices, direct download is always enabled." and so therefore I tried using the WaveformFromTextFile example which is from C:/Users/Public/Public Documents/National Instruments/CVI/samples/niRFSG/ArbitraryWaveforms/WaveformFromTextFile and changes that attribute.  However when I run the example with no modifications I get the following error:

Now I have also tried using your ni/grpc-device server located at github (https://github.com/ni/grpc-device) to change this attribute using python however I get the same/very similar issue:

errorcode:-1074135024
Exception: Error: IVI: Invalid value for parameter or property.

For that I am using the example "getting-started-single-tone-generation" from your nirfsg examples and have added the following to accomplish this:

    raise_if_error( 
        client.SetAttributeViInt32(
            nirfsg_types.SetAttributeViInt32Request(
                vi = vi,
                channel_name="",
                attribute_id=nirfsg_types.NIRFSG_ATTRIBUTE_DIRECT_DOWNLOAD,,
                value=nirfsg_types.NIRFSG_INT32_ENABLE_VALUES_ENABLE
            )
        )
    )

I have also tried using "value_raw=1" as I see that is what NIRFSG_INT32_ENABLE_VALUES_ENABLE enumerates to as well as what the CVI/labwindows example is using to try and set the value.  I see the type is ViInt32 however could that not be the case?  There is no documentation saying otherwise.

I can provide more information if required.  I have posted ni/grpc-device github issues page but because the CVI/labwindows example also doesn't work it leads me to believe this is an issue that is much deeper.

Thank you for your help.