I am updating software that used MySQL 5.4.3 in its old version, and now uses MariaDB 10.2.11. So, I dumped the old data with that command:

mysqldump -uroot -p --no-create-info --skip-triggers --complete-insert theDBName -r C:\Users\myUserName\theDBName_data.dump

Then I uninstalled MySQL and replaced it by MariaDB. After that I created the database and imported the new data structure (a few columns have been added with default values).

The issue occurs when restoring the old data:

mysql -uroot -p --default-character-set=utf8 theDBName
Enter password: ****************

MariaDB [theDBName]> SET names 'utf8';
MariaDB [theDBName]> SOURCE C:\Users\myUserName\theDBName_data.dump
ERROR: Unknown command '\U'.
ERROR: Unknown command '\a'
ERROR: Unknown command '\a'
ERROR: Failed to open file 'C:\Users\myUserName\theDBName_data.dump', error: 2

Restoring the exact same dump with that procedure works well on Linux, but doesn't on Windows.

Thanks for your help.

  • Version MySQL 5.4.3 never existed. Please check again. Perhaps you meant MariaDB 5.4.3?
    – Rick James
    Jul 31, 2019 at 23:57
  • mysql -V result : mysql.exe Ver 14.14 Distrib 5.4.3-beta, for Win32 (ia32)
    – T'lash
    Aug 1, 2019 at 11:26
  • The publisher has delivered to its customers its software with a beta version of mysql...
    – T'lash
    Aug 1, 2019 at 11:38

1 Answer 1


MariaDB [theDBName]> SOURCE C:\Users\myUserName\theDBName_data.dump

Either of the following should be correct:

MariaDB [theDBName]> SOURCE C:\\Users\\myUserName\\theDBName_data.dump

MariaDB [theDBName]> SOURCE C:/Users/myUserName/theDBName_data.dump
  • 1
    Oh, I really did not think about it, and yet it's a common problem... The first solution doesn't work (ERROR: Unknown command '\\'), but the second works as intended. Thank you.
    – T'lash
    Aug 1, 2019 at 11:33

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