is this problem from LinkedIn-API, or my code?

I use LinkedIn-iPhone API to update LinkedIn status, which worked for several times, but most times it does not work well, and it has never worked for the last 5 days. I don't know whether it is the problem of the LinkedIn web site or API connections.

The console log:

++ LinkedIn engine reports failure for connection 98A66D65-A8EB-4ADF-9B03-76EA54AE5DA开发者_运维技巧E The operation couldn’t be completed. (HTTP error 400.), error: Error Domain=HTTP Code=400 "The operation couldn’t be completed. (HTTP error 400.)"

Is the error from the unstable LinkedIn API? or my code?

Silly me, I found the problem of HTTP error 400, which means: Duplicate updates. I changed the message for updating then it works fine.

Not sure whether moderator should delete this post or not? or how do I close it?