Many students think a comma splice is just any kind of comma error, but a comma splice is a very specific type of comma error.
A comma splice occurs when you use a comma to separate two independent clauses. A comma is not strong enough to perform this function, which causes the problem. It’s important to remember to use proper punctuation to separate your independent clauses; otherwise, you end up with a sentence like this:
Here, you should notice the only comma error is the one between again and however. The reason this is a comma splice is because the actually begins a new sentence or independent clause, but there is not a proper boundary between these two sentences. Here is how the sentence could be corrected: