ERROR: Reporting Services Catalog Database File Existence or Reporting Services Catalog Temporary Database File Existence.
Cause : Earlier installed SQL instance leaves the reporting service files which are all in *.mdf file format stops to recreate.
Solution : Needs to delete those files which are all present in the below mentioned location.
‘C:Program FilesMicrosoft SQL ServerMSSQL12.MSSQLSERVERMSSQLDATA’
that needs to be repeated for all the 3 folders which I highlighted in trail images.