Thread:Sol3Bug/@comment-25300745-20160419150732/@comment-27108414-20160419163130

Just keep trying... Once in a while, there is actually a glitch on the G5 end (or crosswired connections within their servers) that prevent a code from working as it should...

On the Friend Code Exchange Board, it is way more likely that the code was used the limited number of times before you entered it, or that person whose code you tried is already on your Friends List...

The longer a code has been up, the slimmer the chance it will work because others will have entered it :)