"Reporting services catalog temporary database file existence" —
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Solved Reporting Service Catalog Database File Existence Failed
As you already installed the MS SQL server before, therefore, the database is already been there and is not get removed. And in this case, if you going for reinstallation, the integrated security SQL server will try to install SQL database with the same name. And hence you got the error; "Reporting Service Catalog Database File Existence Failed"1. Go to
C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\DATA
or
C:\Program Files\Microsoft SQL Server\MSSQL11.MSSQL2012\MSSQL\DATA
or
C:\Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\DATA
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2. Delete following files;
ReportServer$MSSQL2012.mdf
ReportServer$MSSQL2012_log.mdf
ReportServer$MSSQL2012TempDB.mdf
ReportServer$MSSQL2012TempDB_log.mdf
3. Check it again.
I'm sure this will solve your issue. If you know any better way then we would like to add it here if you share it via comments.