Defeading reporting services

I had a real hard time installing SQL-Server 2005 Reporting-Services on this one machine …

The MSI was executing just fine, but the step “removing backups” (don’t know the exact wording in english, since I’m using a german installation) seems to fail.

This is what the msi logfile has to offer:

Aktion 15:59:51: RSSP_CAInstall.28B19132_4741_4761_840F_AC515130EC08.
Aktion 15:59:52: RollbackCleanup. Sicherungsdateien werden entfernt
CA MSG : Running RSCustomAction
CA MSG : Launching C:\DOKUME~1\ADMINI~1\LOKALE~1\Temp\rsCustomAction.exe with command line parameter /i
CA MSG : rsCustomAction.exe failed to configure, Error code is: 1
Aktion 16:02:48: Rollback. Aktion wird rückgängig gemacht:

After much struggle I finally figrued something. First I installed SharePointRS.msi without the custom actions, by executing:

SharePointRS.msi SKIPCA=1

OK. So next I just run the rsCustomAction.exe (which is located in my temp-folder):

rsCustomAction.exe /i

This finally produced some logfiles and a more details error message. In my case the problem was, that the web.config of my portal-site was write-protected!!

After removing the write-protection I was able to install SharePointRS.msi just fine.