A DMS was upgraded to 10.3.5 but we found some issues with IIS. For this reason, we decided to roll back to 10.3.3 and IIS is now fine.
However, the timeline components that we created in the existing Low Code Apps stopped working. As a test we created a blank LCA and also a dashboard with a timeline component; in both cases the timeline will still show the error “Cannot read properties of undefined (reading ‘from’)”. I can tell the query is working because the table component shows the data properly.
As the timeline component is under soft launch option, I suspect the upgrade modify some settings for the component generation. Is there a way to get it working again? Perhaps a manual modification might be enough?
Thanks!
The timeline component will indeed perform a migration step when upgrading to a version >= 10.3.5. Sadly, dashboards will not revert when doing a downgrade. So after the rollback, you’ll end up with a 10.3.5 configuration on 10.3.3 software, which obvisouly is doomed to fail.
Luckily, the migration steps from 10.3.3 to 10.3.5 in the timeline are very limited and can be manually fixed in the json files:
- Go to your the json of your page that contains the broken timeline.
- Go to the timeline component (“Visualization”: “scheduler”) in the json.
- Revert the feedlink:
- Revert the highlighting:
- Revert the version of the visualization:
The error you see in the UI is caused by an invalid/unknown value for timeRangeFeed.
I would expect a functional timeline again after performing these steps.
Thank you, Gilles. I will perform the changes.
@Ward, I will check as well if there is a previous version without the changes, that might easier
In addition to what Gilles said; Low-code apps have versioning. In case you have a version available from right before the up- and downgrade, you could restore that one.