COV subscription setting lifetime to 0 causes Error

[kheldaroz402]

Hi All, I'm trying to talk to a Mitsubishi controller and it only supports COV subscription where lifetime is zero

when I try and do that, I get the following error

File "/opt/WebAI/WebAIPy/BACnetIP.py", line 2087, in <module> @recurring_function(delay) ^^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/WebAI/WebAIPy/virtualenv/lib/python3.11/site-packages/bacpypes/task.py", line 253, in recurring_function_decorator task.install_task() File "/opt/WebAI/WebAIPy/virtualenv/lib/python3.11/site-packages/bacpypes/task.py", line 192, in install_task raise RuntimeError("interval must be greater than zero") RuntimeError: interval must be greater than zero

I also tried setting it to none

class SubscriptionContext:

def __init__(self, address, objid, confirmed=None, lifetime=None):
    if lifetime == 0:
        lifetime = None
    if _debug: SubscriptionContext._debug("__init__ %r %r confirmed=%r lifetime=%r", address, objid, confirmed, lifetime)
    global subscription_contexts, next_proc_id

    # destination for subscription requests
    self.address = address

    # assign a unique process identifer and keep track of it
    self.subscriberProcessIdentifier = next_proc_id
    next_proc_id += 1
    subscription_contexts[self.subscriberProcessIdentifier] = self

    self.monitoredObjectIdentifier = objid
    self.issueConfirmedNotifications = confirmed
    self.lifetime = lifetime

[JoelBender]

Have you started with the COVClientApp.py sample application and you are expecting to call send_subscription() at some interval based on the lifetime stored in the context?

[kheldaroz402]

Yes I think I did start with that app - it's been heavily modified since