The fourth amendment to the United States constitution requires that there be probable cause before a search warrant is issued (i.e. signed by a judge).  Based upon the facts provided, it is unclear whether the warrant at issue lacked probable cause, and/or otherwise was illegal or invalid.  However, if your property has been subject to a search warrant I suggest you consult with and/or retain a criminal defense attorney.  If you feel that the warrant is invalid, or, if an invalid search warrant led to evidence being obtained which is now being used to prosecute you, your defense attorney will be able to advise you with respect to the appropriate steps to take to either prevent the search or suppress the evidence that resulted from it.