Resolved bugs

C1 Version:Not yet released (N/A)...
DescriptionIf a field on a dynamic data type is used for grouping data in the tree, and if the field is defined as an optional data reference, users will get an exception when they try to add data where the grouping reference field is set to 'none'.
Known work around:There is no known work around. If a data reference field is used for grouping, the field should not be optional.