Description: When migrating CRM Recurring Appointments you may get this error if you set a wrong combination of end range.  " Invalid Recurrence Pattern Error "

The value of PatternEndType determines how certain fields in Recurring Appointments need to be populated:

• When PatternEndType=1, make sure Occurrences and PatternEndDate fields are both NULL.
• When PatternEndType=2, DO NOT enter value in the PatternEndDate field since CRM calculates the value automatically.
• When PatternEndType=3, make sure Occurrences field is NULL.