Upgrade from 5.1 to 5.7 to 8.x

[Thomas Jüntgen]

Hello all,

I tried already 3 days and read a lot of post but I didn't come to the goal.
I use Windows 10 and MyISAM tables.

I tried to upgrade to mysql-5.7.29-winx64.
I come to the problem

[ERROR] InnoDB: The Auto-extending innodb_system data file '.\ibdata1' is of a different size 640 pages (rounded down to MB) than specified in the .cnf file: initial 768 pages, max 0 (relevant if non-zero) ...

I tried the In_Place Upgrade.
All my file for the database are located on D:\Programme\MySQL\Server

My steps are
1. shut down the MySQL
2. copy all files 5.7.29 to bin directory
3. change the my.ini file in this way
3.1 removed default-character-set and innodb_additional_mem_pool_size
3.2 change table_cache to table_open_cache
3.3 add at the end
innodb_data_home_dir =
innodb_data_file_path = /ibdata1:10M:autoextend
4. mysql -u root -p

and then the prolem starts.

Thanks for your help
Thomas