In some cases, you might want to completely uninstall the Sneak Preview SAP NetWeaver 2004s Full ABAP Edition. Yes, it is possible. Below is my procedure that you may follow. Note that I will not touch default unless it is necessary so please leave them untouch if I don’t explicitly specify new values.

1. Open folder \SAPNW2004sSneakPreviewABAP\Installation_Master
2. Run UNINSTSAP.BAT
3. Specify Profile Directory to C:\usr\sap\NSP\SYS\profile and press Next button
4. Check the checkbox Remove all instances of the SAP system or standalone engine on this host and Remove OS users of SAP system or standalone engine on this host. Then press Next button.
5. Specify Database Type to MaxDB and press Next button
6. Specify Database ID to NSP and press Next button
7. Specify password of account superdba and account control as you typed during installation and press Next button
8. Check the checkbox Drop the whole database and press Next button
9. Check the checkbox Remove database software and press Next button
10. Verify the parameters and press Start button
11. Press OK button
12. Reboot your machine

At this point, your machine is ready to install Sneak Preview SAP NetWeaver 2004s Full ABAP Edition again.

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