pgAdmin - "cannot open logfile!" (WINDOWS 10; Postgres 9.4)
First you need to identify the value of %APPDATA% on your WINDOWS system.
Change directory to %APPDATA%
Does the folder postgresql exist?  If not create the folder with this name.
Chand directory into postgresql
Does the folder pgAdmin exist?
if not create the folder with this name (note the capital &quot;A&quot;).
In here copy the postgresql.conf file from your Postgres or pgAdmin installation folder
Create an empty pgAdmin3.log file in here
Done