Step 1. I setup a lookup filter on asset object.

Asset Object -> Contact field -> Lookup filter: Asset: Account ID equals Contact: Account Name ID

Step 2. Create few contacts linked to one account.

Step 3. Add a new asset via contact page, click on the lookup contact to select different contact.

The pop-up window shows:

"An internal server error has occurred An error has occurred while processing your request. The salesforce.com support team has been notified of the problem. If you believe you have additional information that may be of help in reproducing or correcting the error, please contact Salesforce Support. Please indicate the URL of the page you were requesting, any error id shown on this page as well as any other related information. We apologize for the inconvenience.

Thank you again for your patience and assistance. And thanks for using salesforce.com!

Error ID: 198796485-896 (960359317)"

Help anyone?

Thanks in advance.