A CSV Export and Import does not work when running on a system with Regional Language settings use a comma as a decimal holder.
Because the OAS Service runs under the SYSTEM Account it is not using the Regional Language settings. In some operating systems when you change the Regional Language the SYSTEM account is not updated. To correct this go to Region and Language under Control Panel, and select the Administrative tab.
Select Copy settings and select the option to Copy your current settings to: Welcome screen and system accounts and select OK.
Restart the OAS Services or restart the operating system.
The CSV export and import will now use your decimal separator selected for the operating system.