Sending table from the Schema Browser to ER Diagram gave "ORA-00904: invalid column name." (60399)

When sending table from the Schema Browser to ER Diagram by right-clicking and selecting ER Diagram, Toad throws ORA-00904: invalid column name.

Toad needs the following tables for the launching the ER Diagram.

SYS.ALL_OBJECTS ALLOBJECTS
SYS.ALL_TAB_COLUMNS ALLCOLUMNS

These tables in the 8i server are missing columns found in a 10g and above server. Specifically, these tables in 8i are missing columns char_length and char_used.

WORKAOUND:
None.

STATUS:
Waiting for fix in a future release of Toad for Oracle