SPIFFS Upload Failed Error Code -10010 While uploading files to ESP8266

Question

I have an ESP8266, WEMOS D1 Mini to be exact , im using a Arduino IDE and the plugin to upload a data to the ESP8266 heres the error messages :

[SPIFFS] data    : C:\WASP-master\data
[SPIFFS] size    : 3048
[SPIFFS] page    : 256
[SPIFFS] block   : 8192
/css/bootstr..m.css.map
/css/bootstr.min.css
/css/bootstrap-theme.min.css
/css/bootstrap-theme.min.css.map
/favicon.ico
/fonts/glyphicons-halflings-regular.eot
/index.html
/js/bootstrap.min.js
/js/jquery.min.js
/js/npm.js
/rules.json
SPIFFS_write error(-10010): unknown
error adding file!
Error for adding content from css!
SPIFFS_write error(-10010): unknown
error adding file!
Error for adding content from fonts!
[SPIFFS] upload  : C:\Users\LEGION\AppData\Local\Temp\arduino_build_916713/WASP-master.spiffs.bin
[SPIFFS] address  : 0x100000
[SPIFFS] reset    : --before default_reset --after hard_reset
[SPIFFS] port     : COM4
[SPIFFS] speed    : 921600
[SPIFFS] python   : C:\Users\LEGION\AppData\Local\Arduino15\packages\esp8266\tools\python3\3.7.2-post1\python3.exe
[SPIFFS] uploader : C:\Users\LEGION\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\tools\upload.py

esptool.py v2.8
Serial port COM4
Connecting....
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: 8c:aa:b5:7a:8b:80
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 460800
Changed.
Configuring flash size...
Auto-detected Flash size: 4MB
Compressed 3121152 bytes to 227763...
Wrote 3121152 bytes (227763 compressed) at 0x00100000 in 12.8 seconds (effective 1951.0 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...

it looks like its not having any problem uploading other file in the folder, only files in the css and fonts folder thats failed.

is there anything i can do to resolve this problem ? Thank you

Answer 1

Seems there is a limitation on SPIFFS file name size of 32 bytes (including starting slash and zero at the end)

/css/bootstrap-theme.min.css.map        --> 32 bytes
/fonts/glyphicons-halflings-regular.eot --> 39 bytes

See documentation https://github.com/esp8266/Arduino/blob/master/doc/filesystem.rst#spiffs-file-system-limitations

https://arduino-esp8266.readthedocs.io/en/latest/filesystem.html#filesystem