Charts/Metacharts loading issue on RPi4 after upgrade to November 3, 2026 build (ver. 6.4). **solved**

[zakos52]

After upgrading from version 6.4 (September 18/19, 2026) to the November 3, 2026 build on RPi4, local and remote charts as well as metacharts fail to load. As soon as I revert back to version 6.3, EVERYTHING works correctly!

Platform: Raspberry Pi 4 Model B Rev 1.1   Rev 1.1
RAM: 3895 MB total, 3746 MB free (3% used)
Storage: ATP SLC, 1.5 GB total, 722 MB free (53% used, 254.2 yrs)
SW Version: Meteobridge 6.4 (Nov 3 2026, build 4380), FW 1.3
Uptime: 0 hours, 59 minutes    Buffer: 3 items (0%)

[grwkak]

Seeing the same thing. Logs say cannot open metachart file "Ecowitt%20snow.metachart": Invalid argument (as an example).
Also, I can't edit any existing charts.

Guy

[zakos52]

The problem must be fixed IMMEDIATELY with a new update!

[admin]

That can be a side effect of hardening the chart.cgi to fix a XSS vulnerability.
Problem is presumably related to spaces used in chart names. I will have a look.

[admin]

Just released update should have it fixed. if not please drop an email directly to me: info(at)meteobridge.com

[zakos52]

I sent an email to info(at)meteobridge.com

[admin]

thanks, that helped a lot fixing the bug. New version should now work fine.

[zakos52]

I sent again an email to info(at)meteobridge.com

[admin]

We had a rocky way to filter out the bugs that the lastest changes brought along as unwanted side effects, but I think now everything should work as expected. Please install latest version released a few hours ago. If not, please drop a note to "info(at)meteobridge.com".

Sorry for the hickups.

[lorenz1982]

Good morning.
I also encountered the same issues with the charts, so I reverted to version 6.3.
Now, however, I am unable to go back to version 6.4. I have already restarted the Raspberry.
What can I do?
Thanks.

[grwkak]

Good morning.
I also encountered the same issues with the charts, so I reverted to version 6.3.
Now, however, I am unable to go back to version 6.4. I have already restarted the Raspberry.
What can I do?
Thanks.

Click on "Get newest on boot" then "Save And Apply" then "Reboot"
That should work - sometimes I find I have to click on another option, save then reselect the get newest option for it to actually take.

Guy

[lorenz1982]

Good morning.
I also encountered the same issues with the charts, so I reverted to version 6.3.
Now, however, I am unable to go back to version 6.4. I have already restarted the Raspberry.
What can I do?
Thanks.

Click on "Get newest on boot" then "Save And Apply" then "Reboot"
That should work - sometimes I find I have to click on another option, save then reselect the get newest option for it to actually take.

Guy

That didn't work, but clicking on 6.2 first and then on "new version" did the trick. Thanks.