The answer to your question depends on what type of partnership it is. If it is a general partnership, you sue the individuals as the partnership is not a separate legal entity.
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It will really depend on a lot of facts that we don't have. If the default was not entered, even if you filed it, the answer is probably going to be okay. If the default was entered, the clerk should have rejected the answer, but, the Court will probably set aside any default in this situation.
Take everything to a local attorney for a consultation.