SAP GUI 7.1 not working

Question

Hi
I installed SAP GUI 7.2 and I encountered some issues (another post on this forum). Because of that I decided do uninstall and install 7.1 again with patch 18
What happens is that now, when I install SAP GUI 7.1, and then patch 18 I enter saplogon.exe and it doesn't open!
I tried several times to uninstall and install again and none of the times i managed to open the saplogon
If i install the GUI 7.1 and open saplogon.exe before I install the patch it works ok, but I can't work properly, I keep getting SAP errors.
I also tried to install patch 17 (the version I had working before i installed 7.2) and it also doesn't work now
Is there a way to clean everything SAP related so I can do a fresh install? Could this be caused by remains from previous installations?
And if so, why does the unpatched version work (even if poorly)?
Thanks

Answer 1

Hello,
- deinstall the sapgui with following command line in START -> RUN
    nwsapsetup /uninstall /all
  *you need administrative user rights
  ( in WTS environment you must also change to installlation mode )
- uninstall the VCREDIST installation in the CONTROL PANEL ->  ADD / REMOVE Software  -> deinstall the
  Microsoft redistributable runtime DLLs VS2005 SP1(x86)
- if exists, delete the folder
   C:\Program Files\Common Files\Sap Shared
- delete all other folders where the sapgui was installed
   c:\program files\sap\Frontend
   C:\Program Files\SAP\Business Explorer
   C:\Documents and Settings\All Users\Start Menu\Programs\SAP Front En
   C:\Documents and Settings\All Users\Start Menu\Programs\Business
      Explorer
- delete then all   "SAP"   entries in the windows  registry in
       HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\SharedDLLs
( ONLY the SAP  entries !!!! )
Now you have a CLEAN workstation.
Please if you have problems in Installation of the sapgui 720, please look at the NWSAPSETUP.log   file
for a first analyse.
Best regards
Sven