What version of TDP are you using? I assume you are using an export wizard template to export? can you turn on verbose logging, produce the error and then post the automation log so i can have a look? This error means somewhere we are executing on the UI thread and it has time out of 15 minutes. We did work on this recently and I need to see if this is fixed in current code.
That I recognize and was fixed in TDP 4.2. Can you upgrade? The issue below also included long running query and timing out.
Export Wizard
N/A
Corrected an issue that caused Toad to hang after selecting a very large table or a query with a large result set on the Select Objects page of the Export Wizard.
QAT-8401