EXP-00025: dictionary shows no column for constraint string .number
What triggered the Error:
Export failed to gather column information about the referenced constraint from the data dictionary. The constraint may have been altered.What should we do to fix it:
Retry the export and, if this error recurs, report it as an Export internal error to customer support.
If this was not sufficient go over to:
Oracle Official Support Knowledge Center
Or maybe those geeks at: StackOverflow Board
Or maybe those geeks at: StackOverflow Board