Oracle Error Message
ORA-01754: a table may contain only one column of type LONG
Reason for the Error
An attempt was made to add a LONG column to a table which already had a LONG column. Note that even if the LONG column currently in the table has already been marked unused, another LONG column may not be added until the unused columns are dropped.
Solution
Remove the LONG column currently in the table by using the ALTER TABLE command.
