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I had encountered the following SQL Server Error when trying to delete a Microsoft Dynamics CRM 2015 rollup field. This is deleting the actual rollup field from the entity and not simply removing the field from a form or view – also it is cleared of any dependency.
<ErrorCode>-2147220970</ErrorCode><ErrorDetails xmlns:d2p1=”http://schemas.datacontract.org/2004/07/System.Collections.Generic” /><Message>System.Web.HttpUnhandledException: Microsoft Dynamics CRM has experienced an error. Reference number for administrators or support: #DFcA6B5C</Message><Timestamp>2016-04-280T18:23:59.7377283Z</Timestamp><InnerFault> <ErrorCode>-2147220970</ErrorCode>
How to Resolve:
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Frank Lee, Microsoft Dynamics CRM MVP since 2006Workopia, Inc. – Microsoft Dynamics CRM Specialist, San Francisco