Setup an FTP 'trace setup' in Options to access a trace file on a linux box. Clicked 'Validate' and this did validate OK. On running a multi-execute with 'include trace stats' checked in the Tuning Lab, the following error occurred:
Access Violation at address XXXXXXX in module QPRB.dll. Read address of XXXXXXXX.
Waiting for fix in a future release of SQL optimizer for Oracle
The issue applies to single and multiple execution of SQLs retrieving FTP trace statistics.