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The code in both appears to be perfectly satisfactory - stock - normal - stream file writing. Do you have an "errno" global variable available? If you do, that might shed some light on the errors you're getting. There's nothing inherent to custom functions that would make your code not work. You're absolutely sure that the SD card was plugged in & functional when you used the custom function and it failed?TDHofstetter– TDHofstetter2014-08-18 20:40:23 +00:00Commented Aug 18, 2014 at 20:40
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