Status Code -50405

[keith331]

Hi Senior

I'm experiencing 50405 occurred when reading. The task only created once when app launch. and then reading io status when ever I want. It runs many times perfectly. but sometimes occurs that error. my nidaqmx version is 0.7.0. I would like to update the version. but this equipment is in the other country. I'm worried about other side effects. Could somebody help Thanks in advance
task_in = nidaqmx.Task() task_in.di_channels.add_di_chan('Dev1/port0/line0:7', line_grouping=LineGrouping.CHAN_PER_LINE) task_in.di_channels.add_di_chan('Dev1/port1/line0')

'call task_in.read() frequently'

[keith331]

Update:
NI said that it's related to USB power. I already used an independent USB port. Would It be helpful if I close task and re-create task regularly ?
https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z0000019MucSAE&l=zh-TW

[zhindes]

Not nearly enough information to help you. Some questions:

• What version of NI-DAQmx driver is installed? Try running this example: system_properties.py
• What device is "Dev1"?
• What does your actual code look like? Just paste it all.
• What Operating System are you using?