Please look for a log (.elf file) in the following folder and send it to us - __C:\Users*user\AppData\Roaming\Dell\Toad Data Modeler__
Another way is to check the Copy to Clipboard option when the error appears again and send us the information in a plaintext file.
If you use custom generation settings, please take screenshots of the What to Generate and Detail Settings tabs.
The error could be caused by a specific model. Could you possibly send it to us via email (lukas.knapek@quest.com)? DDL Reverse Engineering error
Please try to restart TDM and reproduce the error again, just to make sure it was not caused by the first error. Did you manage to reproduce again?
If so, once again, please send us the log file or the error information.
Also, could you send us the DDL file itself (via email)? We suspect the issue is model dependent and having the script would help us tremendously.
As of now, we think the two errors have different cause (DDL Generation vs DDL RE). Once we have more information, we will see what we can do.