Hi Dirk,
This should not be linked to the fact that you are evaluating the product.
This message indicates that an error occured while trying to parse your query. Could you send us your connection string (in your data source) and your query so we can verify what went wrong?
If for some reason you would prefer not to write it on the forum, you can send us an email at our support address (the address is available in the last page of the Reference Manual).
Thank you,
Regards,
Marien Monnier
Enesys