error "in sysdatabases no entry was found for database SpiraTeam" during installation

Usually that means it could not create the database successfully.

Can you verify that the database user that you are using is either the SA account, a Windows Administrator (if using Windows Authentication) or an SA-equivalent account.

Also if you open up C:\Users\[User Name]\AppData\Local\Inflectra you will see an installation log for the system. Are there any errors messages in the log file?

Sorry, I put this thread in the wrong forum, it concerns SpiraTeam, could you move it ? Otherwise I can reenter it in the SpiraTeam Section. Maybe that's why I haven't found the logfile dir you indicated to me?

In the meantime, some additional info: I configure the windows authentication option on creating the database. Using the SqlServer Management Studio Express I'm able to create any SQL Server DB

with this account. Until some week ago I have been able to install Spira, so I'm wondering what goes wrong now?

This hint was efficient, thanks:

++++log++++

Error Occured: Fehler bei CREATE DATABASE. Einige angezeigte Dateinamen konnten nicht erstellt werden. +£berpr++fen Sie zugeh+¦rige Fehler.
Die Datei 'C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\DATA\SpiraTeamLog.ldf' kann nicht erstellt werden, da sie bereits vorhanden ist. +ändern Sie den Dateipfad oder den Dateinamen, und wiederholen Sie den Vorgang.

++++log++++

We had still ldf files in the sql data directory from former installations, after having deleted them, it worked,