Known Issues


You have a previous deployment of PostgreSQL server but don’t know the password for it. You need to reset the PostgreSQL password


Follow the instructions in this document.


The Toolbox Server cannot connect to the PostgreSQL database when the server application and PostgreSQL are deployed on separate machines

The error log shows:

Npgsql.PostgresException: 28000: no pg_hba.conf entry for host "", user "qsartoolbox", database "EpiReports42".

This happens when the QSAR Toolbox Server is installed on one machine and the PostgreSQL database is deployed on a different machine. The PostgreSQL server would need to be configured to allow access to the deployed databases for the QSAR Toolbox Server Application.


  1. Go to PostgreSQL server's Data folder (default folder C:\Program Files\PostgreSQL\9.6\data) and open the pg_hba.conf file.
  2. Add a line to the bottom of the file changing <ToolboxServerHost> to the IP address or hostname of the computer than is hosting the QSAR Toolbox Server.
    host all qsartoolbox md5
  3. Restart the PostgreSQL service.
  4. Restart the QSAR Toolbox Server application/service.

Download Installation Package

QSAR Toolbox Installer version 4.4