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Title
"An error occurred while copying field" error message -
Description
When migrating content, either items, calculated columns or values do not get copied successfully to the target. Instead, the error message below is found in the log:
An error occurred while copying field 'Start Date'.
Cannot add field 'Start Date'. The formula refers to a column that does not exist. Check the formula for spelling mistakes or change the non-existing column to an existing column.
at Metalogix.SharePoint.Adapters.CSOM2013.CSOMAdapter.AddFieldToCollection(ClientContext ctx, List parentList, XmlNode fieldNode, FieldCollection& fields, String displayName, String internalName)
at Metalogix.SharePoint.Adapters.CSOM2013.CSOMAdapter.AddFieldsXML(ClientContext ctx, List parentList, FieldCollection fields, XmlNode fieldNodeXML, Boolean bUpdateFieldTypes, OperationReporting reporting) -
Cause
The column referenced by the calculated column has not been added to the list yet, hence the calculated column cannot be added.
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Resolution
As a workaround, create the calculated column manually on the target, then re-run the migration.
Alternatively, run a "Custom Copy" and update the list fields. Note: This will only work if the referenced columns were added to the target list during the initial full copy.