After upgrading to Toad for Oracle 10.1.1.8 and when I try to load my ER Diagram Model .ERX file via Database Menu | Reports | ER Diagram, I get the error below.
Cannot open the selected Model. The file "C:\Users\<your_user>\AppData\Roaming\Quest Software\Toad for Oracle\10.0\User Files\ERDiagrams\ERD_01.erx" has unknown content.
Upgrade to Toad for Oracle 10.5.0 as this release has an automatic repair feature.
Open your .ERX in Toad for Oracle 10.5 and it should open, however you wil get the error below.
There were errors during loading the diagram.
The automatic repair feature was used, the diagram is not complete.
Re-save it with a new file name and this new file should now open fine in Toad 10.1.1 as well, without any errors.