Your script will need to contain commands for the following operations:

1. Login: When logging into the domain through a script powered by "wget", the login information is passed via URL. The username and password must conform to the rules for a URL, i.e., no un-encoded spaces, underscores, or other dis-allowed punctuation. While special characters are not generally found in usernames, the domain may require that they be used in passwords. If the password uses special characters, it would need to be properly encoded.
   If your site does not use client certs, use the following "wget" command to login to the domain:
   wget --header='Cookie: JSESSIONID=' '[domain name]/servlets/TLogin?Login=Login&loginID=[username]&password=[password]'
   If your site uses client certs, use the following "wget" command to login to the domain:
   wget --sslcertfile=./[domain name].crt --sslcertkey=./[domain name].key --header='Cookie: JSESSIONID=' 'https://[domain name]/servlets/CertLogin?Login=Login&password=[password]' .
   
2. Execute the saved query/report: Using "wget", this command executes the query/report and saves the response to the file you specified in [filename]. The [project name] corresponds to the name of the project, where the saved query/report resides.
   wget -O [filename] --header='Cookie: JSESSIONID=' 'http://[project name].[domain name]/[URL]'
   

Though the example commands above are specific to "wget", the ability to script Project Tracker to export data is not. The listed sequence of operations hold true for any scripting or programming language you'd use to drive an export.