firmware 2.3.0

counter uppercase lowercase     error
58                a             leds blinking
18                b             leds blinking
17      D                       leds blinking
299               b             AttributeError: 'int' object has no attribute 'thresholds'
69                b             leds blinking
128               a             leds blinking

(re-programmed firmware 2.3.0)

counter uppercase lowercase     error
73                b             AttributeError: 'int' object has no attribute 'thresholds'

Additionally, a pop-up window appeared with the message:
"E:\SOCK_DGRAM could not be opened: Files of type "application/octet-stream" can not be opened"
Please note that this error message may contain translation mistakes, the original was in German.

And this was the error message of serial terminal of IDE:

Traceback (most recent call last):
  File "<stdin>", line 125, in <module>
  File "<stdin>", line 64, in doCalculations
  File "discard", line 1
  File "SOCK_DGRAM", line 1
AttributeError: 'int' object has no attribute 'thresholds'

counter uppercase lowercase     error
64                c             NameError: name 'counter' is not defined
44                a             leds blinking
92      B                       leds blinking
11                b             AttributeError

Traceback (most recent call last):
  File "<stdin>", line 125, in <module>
  File "<stdin>", line 64, in doCalculations
  File "BlobAnalyser.py", line 200, in findLandmarkCombo
  File "", line 1
AttributeError: 'int' object has no attribute 'thresholds'

counter uppercase lowercase     error
12                b             leds blinking
22                a             leds blinking
86      B                       AttributeError

Traceback (most recent call last):
  File "<stdin>", line 125, in <module>
  File "<stdin>", line 64, in doCalculations
  File "BlobAnalyser.py", line 202, in findLandmarkCombo
AttributeError: ',' object has no attribute 'possibleLandmarkIDs'

Meanwhile, files called  (yes, rectangle) appeared on the sd, one containing 256 KB and one 17 KB.
How there could be 2 files with the same name and no file extension, I can't explain...
In the zip file is a screenshot. Opening the  file with a texteditor showed me the error that the file
doesn't exist. Trying to delete them showed me the error the filename would be invalid or too long.

Here I started printing free and allocated memory:

counter uppercase lowercase gc.mem_alloc() gc.mem_free() error
50                a         53632          288           leds blinking
7                 a         53904          16            leds blinking
100               a         53680          240           leds blinking
47                a         54016          21920         leds blinking, mem_free probably wrong?
51                a         53712          208           leds blinking

Looks like the error occures, when there is too less memory free...

I added an gc.collect() at the begin of findLandmarkCombo(). Then the mem_free was
always about 20500, and I had no issues anymore