Error filtering events for calendar errors

[alfincorporated]

I have a Microsoft 365 calendar and a Yahoo calendar that will not work.

Microsoft 365 error - RangeError: Invalid time zone specified: undefined
Yahoo Error - TypeError: a.status.toUpperCase is not a function

I've attached the log files.

obsidian.md-1742227197490.log

[muness]

Thanks for the bug report. When I've tried o365 calendars they've worked fine. I didn't even know Yahoo calendars are still a thing.

While the log file gives me hints, what would help is examples of the events that are failing. Maybe an ICS with the examples anonymized?

[alfincorporated]

Here are the ICS files for both calendars. I have several other O365 calendars that work just fine.

I could not upload the files with the ICS extension, so I renamed it with the txt extension. You can change the extension back as they are really ICS files.

YahooICS.txt
O365 CalendarICS.txt

so I thought that one failing was odd.

[cadm2]

Hello! I am very grateful for this plugin.
I started investigating this issue because I began receiving the same error with MS365 calendars at some point.

RangeError: Invalid time zone specified: undefined

After embedding some debug logs, I found that the error occurs at line 74 of icalUtils.ts.

recurrenceDates = event.rrule.between(localStartOfRange, localEndOfRange, true);

When the error occurred, the tzid of the rrule was undefined, the length of the between array was 0, and the other conditions differed from those of normal repeating events.
We do not know why the event state was different.

I don't understand the entire code, but the plugin works when I work around the error using a try-catch statement.

 try {
 recurrenceDates = event.rrule.between(localStartOfRange, localEndOfRange, true);
 } catch (error) {
 console.error("[processRecurringRules] Error in rrule.between:", error);
 return;
 }

I would be happy to help you find a solution.

I'm also attaching the ics file of the event that was causing the error.
error_sample.txt

[muness]

Hi @cadm2 - I just pushed #178 that changes this code path. Any chance it fixed it? 🤞

[cadm2]

Hi @muness
Thank you for your quick response.
I tried with version 1.10.1 and unfortunately the error was not improved.

plugin:ics:13718 Error filtering events for calendar MS365: RangeError: Invalid time zone specified: undefined 
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