BUG #15654: COPY command not working for 2gb CSV files

The following bug has been logged on the website:

Bug reference:      15654
Logged by:          Sandeep Kumar
Email address:      sandeep.t.kumar@gmail.com
PostgreSQL version: 11.0
Operating system:   Windows
Description:

Hi Team,

When i am trying to import the data from CSV file of 2 GB , getting
following error and i have observed that the file size of less then 2 GB
went well without any issue.Please look into this and provide your inputs on
this.

Command I am using
-----------------------------
Copy table From '<Filename>.csv' DELIMITER '~' null as 'null'  encoding
'windows-1251' CSV; select 1; 

Error I am getting
------------------------
ERROR:  could not stat file "<Filename>.csv": Unknown error
SQL state: XX000

Thanks
Sandeep