Hi Oscar,
Thanks!
Yes, I'd try with a second song. Which plug-ins are you using in VE PRO 6? Do you want to try adding more instruments and see which ones are freezing Logic Pro?
When Logic Pro is freezing, you can also get a hang sample like this:
Can you please send us a sample from the hang?
=> Open Activity Monitor
=> Choose Vienna Ensemble PRO and Logic Pro
=> Click the small "i" in the upper left corner
=> Click "Sample" in the lower left corner
=> Save the file and send it to us: support@vsl.co.at, with a reference to this thread.
Best,
Paul