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Analog.ReadRaw unhandled exception in SecretLabs.NETFM


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#1 nicualex33


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Posted 31 May 2013 - 03:12 AM



I'm running an app with few threads, reading couple of sensors 10 seconds and showing the results on cosm and an LCD display. One of the sensors is analog and i'm using the standard Readraw to get my values.



After a while ( random 1 , 2 hours or more ) , the app is crashing , with the following message in the console:


[font="consolas;"]A first chance exception of type 'System.NullReferenceException' occurred in SecretLabs.NETMF.Hardware.AnalogInput.dll[/font]

[font="consolas;"]An unhandled exception of type 'System.NullReferenceException' occurred in SecretLabs.NETMF.Hardware.AnalogInput.dll[/font]


I'm using latest Netduino Plus 2 firmware ( 4.2.2 ).Any ideas ?



cheers, Alex




#2 hanzibal


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Posted 31 May 2013 - 07:56 PM

Hi, That "first chance" is from an exception being caught in a try...catch and the second is an exception (the same?) not being caught. I suppose the error is what it is said to be, e.g. an object that unexpectedly has a value of null. Since the code has run for quite a while and the exception looks not to originate from your own code, my guess would be that it is due to unsufficient memory available or something else that builds up over time. I would think its hard for anyone to say much more about it having not seen your code.

#3 nicualex33


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Posted 01 June 2013 - 12:15 AM

tnx, will monitor the available memory and see if I can get more info

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