BAC0 readMultiple prints exception and then throws the same exception when segmentation is not supported

[derekatkins]

I was running a scanner application against a bunch of (old) Schneider devices that do not support segmentation. The code snippet in question basically does a readMultiple and, if it gets a SegmentationNotSupported it falls back to individual reads:

    BAC0.log_level(log_file=None, stdout=None)
    try:
        async with BAC0.start(ip) as bacnet:
            await bacnet._discover(networks='known')
            discovered_devices = bacnet.discoveredDevices
            for key, device in discovered_devices.items():
                bacnet_device = await device_object.get_device_properties(bacnet, router_dict, device, app_logger)
    ...

device_object.get_device_properties:
    try:
        device_name, vendor_name, description, system_status, model_name, firmware_revision, application_software_version, location = \
            await bacnet.readMultiple(f"{address} device {device_id} objectName vendorName description "
                                      f"systemStatus modelName firmwareRevision applicationSoftwareVersion location")

    except BAC0.core.io.IOExceptions.SegmentationNotSupported:
        device_name = await bacnet.read(f"{address} device {device_id} objectName")
        ....

However, the output I get is:

2025-03-19 16:56:18,865 - ERROR   | exception: segmentation-not-supported
Traceback (most recent call last):
  File "BAC0/core/io/Read.py", line 276, in readMultiple
    response = await _app.read_property_multiple(address, parameter_list)
  File "bacpypes3/service/object.py", line 543, in read_property_multiple
bacpypes3.apdu.AbortPDU: segmentation-not-supported
2025-03-19 16:56:19,638 - ERROR   | exception: segmentation-not-supported
Traceback (most recent call last):
  File "BAC0/core/io/Read.py", line 276, in readMultiple
    response = await _app.read_property_multiple(address, parameter_list)
  File "bacpypes3/service/object.py", line 543, in read_property_multiple
bacpypes3.apdu.AbortPDU: segmentation-not-supported
...

If you're going to throw an exception then why print the exception?

[ChristianTremblay]

Troubleshooting BACnet devices and comm is not an easy task. This is why I use print. Especially with old devices... I will need time to look at this

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[ChristianTremblay]

Thanks for reporting. I'll have a look at this. Thanks for your patience.

[github-actions[bot]]

This issue had no activity for a long period of time. If this issue is still required, please update the status or else, it will be closed. Please note that an issue can be reopened if required.