===CDF display format (mandatory)===__NOEDITSECTION__
The combination of cdf_datatype in table ''customdefinedfield'' and fieldtype in table ''field'' must be correct. When data type has been changed directly in table ''customdefinedfield'' or data has been migrated these combination might be wrong[[CDF display format|(query)]].
Common errors are.
===CDF missing in table field (mandatory)===__NOEDITSECTION__
We have had a few cases where CDFs have been missing in the table ''field'' or in the table ''customdefinedfield''[[CDF missing in field|(queries)]].
===Duplicate CDFs (mandatory)===__NOEDITSECTION__