Error Troubleshooting

A connection with the server could not be established

Symptom

When attempting to upload images to your web server, the upload fails and you see this error message.

Cause

This usually means the client cannot reach the server.

Resolution

• Verify the HTTP port in your code matches the server’s listening port. Set it with HTTPPort.
• Confirm the server address is reachable (ping it from a client machine). Use either the machine name or IP with HTTPUpload.

Note: Both the machine name and the IP address of the server can be used for the HTTPUpload method.

Original post creation date: Dec 10, 2020

Last modified date: Jan 21, 2026