The error is a low-level bootstrap error. It occurs before the application fully initializes. In other words, Reports Builder tries to display a friendly error message but cannot because the file containing that error message is missing or inaccessible.
Introduction Oracle Reports is a powerful enterprise reporting tool used for decades to generate pixel-perfect reports from databases. However, like any sophisticated software, it is not immune to configuration issues. Among the most frustrating errors encountered by developers and DBAs is: REP-0001: Unable to find the report builder message file. Please verify your installation. This error typically appears when launching Oracle Reports Builder (either the standalone client or via a developer suite) or when attempting to compile or run a report from the command line. The message indicates that the Report Builder executable cannot locate a critical resource file—specifically, the message file that contains all the text strings, error messages, and prompts used by the application. The error is a low-level bootstrap error
A: Check that antivirus software is not deleting .msb files during installation. Also, ensure that you have no remnants of old Oracle homes in the system PATH . Please verify your installation