Can't get CREATE TABLE for table `index_rel`

Error message:

# mysqldump -u root -p tablename > mysql_dump_tablename.sql
Enter password:
mysqldump: Can't get CREATE TABLE for table `index_rel` (Can't open file: 'index_rel.MYI'. (errno: 145))

How to resolve a problem:

# mysql -u root -p
mysql> repair table tablename

or

# mysqlcheck --repair --extended --all-databases