RE: Creating a report within Opportunities that show the total value of opps for a contact
Hi,
Each Rollup field creates two accessory fields with <fieldname>_date and <fieldname>_state suffix pattern.
Can you please add these two fields on your form and check the value of it.
State Description
0 => NotCalculated The field value is yet to be calculated.
1 => Calculated The field value has been calculated per the last update time in _date field.
2 => OverflowError The field value calculation resulted in overflow error.
3 => OtherError The field value calculation failed due to an internal error. The following run of the calculation job will likely fix it.
4 => RetryLimitExceeded The field value calculation failed because the maximum number of retry attempts to calculate the value was exceeded due to high number of concurrency and locking conflicts.
5 => HierarchicalRecursionLimitReached The field value calculation failed because the maximum hierarchy depth limit for the calculation was reached.
6 => LoopDetected The field value calculation failed because a recursive loop was detected in the hierarchy of the record.
docs.microsoft.com/.../define-rollup-fields
Also, have you tried calculating the value of rollup field manually by clicking on Refresh button on form.
Online recalculation option. If you hover over the rollup field on the form, you can see the time of the last rollup and you can refresh the rollup value by choosing the Refresh icon next to the field, as shown below:
Rollup field on the account form in Dynamics 365 for Customer Engagement.