Legal Removal Request

Post: I am developing on ArchLinuxArm, using Python 3.I have arranged my code such that all I/O to the expansion boards is only performed in one thread (except, possibly, the RTC, which is handled by the OS.I am experiencing a problem that the I/O thread crashes fairly often (sometimes within minutes of starting but at other times it will run for several hours) with the following traceback:[root@automate ~]# Main.pyException in thread Inputs.Inputs:Traceback (most recent call last): File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner self.run() File "/usr/lib/python3.5/threading.py", line 862, in run self._target(*self._args, **self._kwargs) File "/root/Inputs.py", line 23, in Inputs analogn.sense() File "/root/Analogs.py", line 21, in sense self.values.append(adc.readADCraw(self.channel)) File "/root/ABElectronics_Python3_Libraries/ExpanderPi/ABE_ExpanderPi.py", line 61, in readADCraw r = self.__spiADC.xfer2([4 + (channel >> 2), (channel & 3) << 6, 0])OSError: [Errno 22] Invalid argument If I insert a print statement into my code, the problem appears to go away - the system will run reliably for more than a day.The analogue inputs are being scanned once a second with this code:# Analogs# 2016-05-08 21:46from ExpanderPi.ABE_ExpanderPi import ADCadc=ADC()class Analog: def __init__(self, pi, channel, avcnt): from Initialise import analogs self.channel=channel self.values=[] self.avcnt=avcnt analogs.append(self) self.value=0.0 def sense(self):# print(self.channel,self.avcnt,self.values) if(len(self.values) >= self.avcnt): self.values.pop(0) self.values.append(adc.readADCraw(self.channel)) self.value=sum(self.values)/len(self.values) def read(self): return self.value I have no problem with the digital inputs, which are being scanned ten times a second. Can anyone offer any advice or explanation for this problem?