Hi Michael,

Do both machines have comparable saved credentials in their .netrc or _netrc files? Perhaps this is related to permissions and/or authentication.

https://www.labkey.org/wiki/home/Documentation/page.view?name=rAPI

Is the script just making a single call to labkey.selectRows(), or is it performing other requests?

Have you checked the access logs for the web server? It might provide useful information about differences between the original request URL, or possibly what the redirect target is, assuming the machine where it's working is successfully following a redirect.

Thanks,
Josh