Sigh. So many times this same question gets asked. :) Clearly not your fault of course, given the number of others who trip over the same issue. I think it is something in how the message is worded, but many users think it is an error report, so they get confused. At least I do not see the word terminated, which really gets people upset. Even then, termination is just a synonym for the word done.
You say the optimization did not carry out. But what did you expect it to do? Display a picture of a little dancing frog, singing a song to tell you it is happy with the result? :) Mathworks would probably need to get a license for Kermit from the Henson heirs then, which would be expensive. Not gonna happen. Anyway, computers are generally on the dour side.
What does it say? Is this an ERROR message? NO! Errors in MATLAB are shown in red. This is the output of the solver, saying that as far as it is concerned, it is done. All constraints are satisfied, and it does not find anyplace better to search. fgoalattain thinks it solved the problem you posed to it to solve.
Now, it is still possible that you have some problem, since it quit after only one iteration. That may indicate you just posed a truly trivial problem to solve, or it may indicate that in some way, your problem is not properly formulated. (There are many basic mistakes people make.) We don't know. But as far as it is concerned, fgoalattain is happy at what it did.
Maybe the software really should display a little smiley face. All is good in the world as far as it is concerned.
