In this post, you’ll learn more about the Oracle ErrorEXP-00007: dictionary shows no columns for string.string with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
EXP-00007: dictionary shows no columns for string.string
Reason for the Error EXP-00007: dictionary shows no columns for string.string
Export failed to gather column information from the data dictionary. The table may have been dropped.
How to fix the Error EXP-00007: dictionary shows no columns for string.string ?
You can fix this error in Oracle by following the below steps
Retry the export and, if this error recurs, report it as an Export internal error to customer support.