More context is needed, but the above post is correct. Trespassing is a civil claim that can be brought seeking monetary recovery for damages sustained for trespassing on property or to title. Criminal trespass can be either a Class A, B or C misdemeanor depending on the circumstances of the alleged trespassing.
In general, when someone accuses another of trespassing, they are accusing them of criminal trespass. There are times when trespassing can be pursued in civil court but this generally involves repeatedly crossing across someone's property or a large corporation. Criminal trespass is generally when a person has been told to stay off certain property (or out of a specific place or store) and they return to the place. (They can also have notice not to be on the property / at the place via a posted sign.)
Although I have answered the question to try to help you, you should consult with a lawyer in your area in person on the matter. In addition, my answer does not establish an attorney-client relationship between us.