The error messages related to the use of QPR WAS can be customized to suit the user's or the organization's needs. To do this, edit the qprsettings.dat file, which is stored in the CGI-binary installation directory. See Appendix D for information about settings available in qprsettings.dat. Some error messages are also customizable by editing the [WAS Messages] section of the QPR_Servers.ini file, which is described in Appendix A.
Note that when using QPR.ISAPI.dll with Microsoft IIS, restarting only QPR Web Application Server is not sufficient to get qprsettings.dat changes into use, but you also need to restart IIS e.g. by running iisreset.