Troubleshooting You can determine the source of issues by examining the error messages produced by the Genero Report Engine. You can also report issues to support. Report Writer error messages A list of configuration error messages. For messages that are not self-explanatory, additional information is provided. Genero Report Engine error messages A list of Genero Report Engine (GRE) error messages. For messages that are not self-explanatory, additional information is provided. Redirect log messages to a file By default, GRE error and warning messages appear in the standard output. However, you can redirect these messages to a log file. Report an issue to support Use the GREDATAFILE environment variable to generate debug information that you can use in a support ticket.