Invalid AIO pin specified - do you have an ADC?

[Rva]

on a fresh BeagleBone Green ( debian not updated) 

this script was working 

#! /usr/bin/python

import sht31

import mraa

cov = mraa.Aio(0)

print "COV: %s" % cov.read()

with sht31.SHT31(2) as sht31:

    sht31.turn_heater_on()

    sht31.turn_heater_off()

    temperature, humidity = sht31.get_temp_and_humidity()

    print "Temperature: %s" % temperature

    print "Humidity: %s" % humidity

AFTER an apt-get install upm , that has updated librma0 and of course no change of port, sensor etc..

The same script returns an error :

Traceback (most recent call last):

  File "./test.py", line 5, in <module>

    cov = mraa.Aio(0)

  File "/usr/lib/python2.7/dist-packages/mraa.py", line 1544, in __init__

    this = _mraa.new_Aio(pin)

ValueError: Invalid AIO pin specified - do you have an ADC?

What did I wrong ? what is the solution ?

[Rva]

I add the following from apt log :

Commandline: apt-get install upm

Upgrade: upm:armhf (0.5.1-git20160410-0rcnee1~bpo80+20160410+1, 0.7.0-git20160609-0rcnee3~bpo80+20160609+1), libmraa0:armhf (0.9.5-git20160420-0rcnee1~bpo80+20160420+1, 1.0.0-git20160609-0rcnee3~bpo80+20160609+1)

End-Date: 2016-09-18  18:41:27