Troubleshooting

TrekForge / Guides

Most problems come from the file or from a setting, and have a quick fix. If yours is not here, tell me about it.

Uploading

"Is not a GPX file". You may have a FIT or TCX file. See how to export a GPX file.
"Could not read". The file may be damaged, or may not really be a GPX file. Export it from your app again.
"Has no route in it". The file may hold only saved places. Export the track or route.
Too large. Each file can be up to 25 MB, with up to 50 files. Try a simplified export.

The map

A straight line across the map. Your recording may have a gap. Turn off "Join tracks in order" or "Join end to start" if they added it.
The route covers too much ground. Remove a file, or split the route into sections.

Terrain

Asked for a key. You chose a source that needs a free OpenTopography key. Choose AWS Terrain Tiles instead, which needs none.
No terrain data here. Some sources stop at 60° north. Try another source.
Summit looks low. See terrain data and accuracy.

The model

The route is too thin to print. Increase Route width, or reduce the Fit gap.
The route will not go into the groove. Raise the Fit gap and print the route again. Do not scale either file in your slicer.
The route is loose. Lower the Fit gap, or use a little glue.
The land looks flat. Raise the Height scale.
The model does not fit your printer. Lower the Model size, and download again.

Downloading

The model has gone. Models are deleted after 2 hours, and routes 6 hours after you last used them, to protect your privacy. They also go when the site restarts. Upload your file again. A saved settings file brings your settings back in one click.
The download will not start. Wait a moment and try again, as only a few can run at once.

Last checked 1 November 2026.