Resolve "An error occurred while communicating with the database. Please see the application event log for more detailed information." having installed EngageOne Content Author

OS : Windows 7
Version DOC1: 6.0m6
Version Content Author: 6.0.1835.0


Having installed Content Author Admin Client, installation finished successfully, but starting the admin client gave error below:

User-added image



The installation was not "Run as an Administrator".

Or there was a firewall preventing contact with the machine running SQL.


UPDATED: November 1, 2017
Re-run the content author configuration manager from the icon on the desktop (right click and run as administrator). Once the setup tool opens, run all the steps again.

Also ensure that the machine running SQL has no firewall enabled and SQL server is running in mixed mode. 

Once all done, try using Content Author again.