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Error during MS Office Recurrence rule parsing


We’ve faced another issue with recurrence rule parsing for MS Calendar event.
The rule pattern is next:

String pattern = "DTSTART:20200921T010000\n" +
        "DTEND:20200921T013000\n" +        "RRULE:FREQ=WEEKLY;UNTIL=20210315T010000Z;INTERVAL=2;BYDAY=MO;WKST=SUEXDATE;TZID=AUSCentralStandardTime:20201130T103000";

Executing fromString method throws such error:

The string of a recurrent rule does not correspond to the standard: options of a rule  is not retrieved
AsposeException: The string of a recurrent rule does not correspond to the standard: options of a rule  is not retrieved
  at com.aspose.email.RecurrenceRule.d(SourceFile:889)
  at com.aspose.email.RecurrenceRule.c(SourceFile:853)
  at com.aspose.email.RecurrenceRule.a(SourceFile:669)
  at com.aspose.email.CalendarRecurrence.<init>(SourceFile:89)
  at com.aspose.email.MapiCalendarRecurrencePatternFactory.fromString(SourceFile:1043)

If I delete the last part of pattern there will be another exception:

String pattern = "DTSTART:20200921T010000\n" +
        "DTEND:20200921T013000\n" +        "RRULE:FREQ=WEEKLY;UNTIL=20210315T010000Z;INTERVAL=2;BYDAY=MO;WKST=SUEXDAT";

Incorrect option value ‘BYDAY’ a recurrent rule: ‘SUEXDATE’
AsposeException: Incorrect option value ‘BYDAY’ a recurrent rule: ‘SUEXDATE’
at com.aspose.email.RecurrenceRule.b(SourceFile:839)
at com.aspose.email.RecurrenceRule.c(SourceFile:862)
at com.aspose.email.RecurrenceRule.a(SourceFile:669)
at com.aspose.email.CalendarRecurrence.(SourceFile:89)
at com.aspose.email.MapiCalendarRecurrencePatternFactory.fromString(SourceFile:1043)

Could you please take a look at these issues?



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  • Your input file.
  • Please create a simple application (source code without compilation errors) that helps us to reproduce your problem on our end and attach it here for testing.

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Hi @tahir.manzoor,

Unfortunately I don’t have an input file as event data is retrieved using API. Recurrence rule pattern is computed programmatically.
So PFA AsposeTest.zip (67.3 KB) archive that contains source code with issue.

Hope that will be enough to find a problem.

Thank you!


We have logged this problem in our issue tracking system as EMAILJAVA-35009. You will be notified via this forum thread once this issue is resolved.

We apologize for your inconvenience.