In the Toad for Oracle schema browser, the Temp tablespace Max size is less than tablespace size.
(See attached screenshot)
After tracing the SQL to extract the tablespace, the SQL to extract Temp tablespace is incorrect.
You need a temporary tablespace with more than one data files files with autoextend on some of the datafiles.
This issue was fixed in Toad 12.0. The latest version of Toad can be downloaded here .