mysqlbackup fails everytime

User_CPA8P

trigerring mysqlbackup (from a Windows service) always fails , exit code=9 (IO operation failed).

It works fine when triggered from command line

I used procmon to trace this, mysqlbackup does not even attempt to create the files

My application uses system call (from procmon logs):

C:\Windows\system32\cmd.exe /c mysqlbackup --user=root --password=passwordhehe --port=3306 --with-timestamp --backup-dir=C:\BackUp_MSQL\NBMYSQL_5688_1655104226 backup

The same command from command line works fine

User_CPA8P

I even set that the same path environment variable