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"Could not remove directory \usr\Cfg" message when upgrading M241/251 firmware

  • When upgrading using Controller Assistant and USB cable, error message "Could not remove directory \usr\Cfg" is displayed.
  • When upgrading using SD card "Delete "/usr/*" (line 1) returned cleaning error" appears in SCRIPT.log file.

This is because some corrupted files can not be deleted.
To delete these files " Format "/usr" " should be added to SD card script.

In firmwares starting from v4.0.2.52 " Format "/usr" " is added automatically by Controller Assistant when generating SD cards.
 
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