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We use MyDAC Versopm 4 connection to MySQL 4.1

At design time, I set the TMyTable Active to True and got the error:
"A call to an mysql_server_init failed.
C:\Temp\EmbedExperiment|data\ibdata1 - The file exisits
C:\Temp\EmbedExperiment|data\ib_logfile0 - The file exisits"

I copied these files from the MySQL Server data directory. Should I ?

Most possible, you connect to one datafolder from two different instances of embedded server. These are probably connections from Delphi IDE (design-time) and your application (run-time).

>>Most possible, you connect to one datafolder from two different instances of embedded server.<<

What is this mean ?

ManUtd wrote:C:\Temp\EmbedExperiment|data\ibdata1 - The file exisits
C:\Temp\EmbedExperiment|data\ib_logfile0 - The file exisits"

Symbol '|' not valid for windows filesystems.

You run one application twice or more, or connect to server in design-time too.