Yeah, I'm getting that a lot too. It's really annoying. %

I get that 999 error with just opening a few tabs.

Here is the yahoo help page on getting rid if yahoo 999 error.

http://help.yahoo.com/kb/index?page=content&id=SLN2253&actp=search&viewlocale=en_US&searchid=1334184124947&locale=en_US&y=PROD_ACCT

Pl let me know if it helps.

Thanks

I just started trying to figure out how to use the api, run a few queries on the YQL console, and every day I run into the 999 error after a short time.  After that I can't even get to the documentation pages or the forum.  So it's been impossible to get any clue how this stuff works.

Sorry for the inconvenience. The issue is caused by over-sensitive filter settings. YDN is currently working to resolve this. 

Happened to me. I have my own static ip and made a few requests and suddenly 999 errors. I know nobody else is using my ip addresses. Very frustrating.