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@DrAzzy
I have a program that reads a pair of DHT's (11 and 22, to compare their readings), shows them on a Nokia 5110 screen, and every ten seconds, records the latest data on the SD card. Every time I go away and leave it, I come back to find something like this on the console:
ERROR: Unable to write file : DISK_ERR
ERROR: Unable to write file : DISK_ERR
ERROR: Unable to write file : DISK_ERR
ERROR: Unable to write file : DISK_ERR
ERROR: Unable to write file : DISK_ERR
ERROR: Unable to write file : DISK_ERR
ERROR: Out of Memory!
ERROR: Out of Memory!
WARNING: Unable to create string as not enough memory
ERROR: Out of Memory!
ERROR:
(with cursor at the end of the word ERROR:)
Using v55 firmware, connecting via bluetooth. After reset, SD card is found to be working normally.
All of the DISK_ERRs come in fairly rapid succession (either all at once, or once per attempted append once the problem manifests). I don't know what the exact timing is, since I've never been watching the console when it happens.