Expedition Navigation Software / Error message: unable to open Pol4 polar

**Posted by michaelmorin** 7/05/2025 8:59 am

I'm getting this message: unable to open Pol4 polar with 2 choices and neither does anything. Expedition won't open. I have to go to task manager to shut down Expediiton. Yesterday I entered new polars from US Sailing, everything worked and today the message. I have rebooted and tried many times to launch Expedition. What should I try next?

**Posted by Nick** 7/05/2025 2:13 pm

Pol4?

Maybe send me the polar?

**Posted by michaelmorin** 7/06/2025 11:22 am

Nick,
Below is a link to the polars. Pol4 is one of the tabs within Expedition. I uploaded the polars to all the tabs within the polar section. I have recieved an error messge in the past whenever I haven't done that. Error message now says unable to open Perf Folder.
Polars from US Sailing 2024 Expedition format.txt

**Posted by Nick** 7/06/2025 1:44 pm

Thanks. The custom polars should be Pol0 to Pol3 I think.

That polar seems ok here.

The easiest solution might be to use the Expedition System Retsore app, although you will lose your various settings.

**Posted by michaelmorin** 7/06/2025 6:27 pm

Nick, The boat computer doesn't have the new polar chart loaded, so it's still working. I'm planning on running the restore as suggested on the 2nd computer we run. Can I download settings from the boat computer and then load them into the 2nd one? I'll just need to re-construct my recent setting changes in both. Does the help section outline how to download them? Thanks

**Posted by Nick** 7/06/2025 7:17 pm

You can save settings from the menu at the top left.

Whether they can be used on the other ocmputer depends on whether the ports etc are the same.

**Posted by michaelmorin** 7/07/2025 9:52 am

How do i restore? I'm in Expediton restore, but it doesn't go beyond asking me to delete setttings. If i check all of them or uncheck all of them, nothing happens.

**Posted by Nick** 7/07/2025 1:21 pm

You need to have all other Exp apps closed.

It just lets you delete settings so Exp can re-create them when next run.

**Posted by michaelmorin** 7/07/2025 5:46 pm

Site key please
64ad-41dd

**Posted by Nick** 7/08/2025 5:15 pm

You need to email the site code ...