Netweaver Developer Sneak Preview SP9 (or so) uninstallation issues

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I am unable to uninstall the previous version of the Dev Preview.

What is the sure shot process by which I should go about it ?

I was able uninstall the Develooper Studio but MaxDB will not uninstall and give some error when invoked from the Add/Remove panel.

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Error as displayed in Commandline Window

uninstall following package(s):

Database Kernel c:/sapdb/j2e/db 7.5.00.18 32 bit

PCR 7500 c:/sapdb/programs 7.5.00.18 32 bit

PCR 7403 c:/sapdb/programs 7.4.03.35 32 bit

Webtools c:/sapdb/programs/web 7.5.00.18 32 bit

DB Analyzer c:/sapdb/programs 7.5.00.18 32 bit

XML Indexing Engine c:/sapdb/programs/web 7.5.00.18 32 bit

ODBC c:/sapdb/programs 7.5.00.18 32 bit

Server Utilities c:/sapdb/programs 7.5.00.18 32 bit

Loader c:/sapdb/programs 7.5.00.18 32 bit

PCR 7104 c:/sapdb/programs 7.1.04.45

JDBC c:/sapdb/programs 7.6.00.00

PCR 7300 c:/sapdb/programs 7.3.00.51

PCR 7301 c:/sapdb/programs 7.3.01.17

Base c:/sapdb/programs 7.5.00.18 32 bit

start uninstallation now (y/n)?y

found instance J2E

cannot remove package "Database Kernel": first you have to remove all instances

fatal error at Sa, Aug 06, 2005 at 12:08:21

press any key...

Message was edited by: Abhishek Sanwal

PS: I have tried this in several sequences. NWStudio before / after and w/ and w/o the SAP Services running (as in Windows Services)

Message was edited by: Abhishek Sanwal