I suggest your wife request her lawyer to advise his client to stop all communication on this matter with her. Her lawyer should let his lawyer know that she will file suit against him to recover any and all additional legal expenses she incurs as a result of his continued harassment and refusal to follow the judge's instructions.
To answer the question - CAN he file. Yes - he can - it is his legal right. Will a judge simply reverse his decision or even listen to the exact same argument again without there being a change in the circumstances where a change in custody will result in something that is in the best interest of the child... THIS SOON after just making a decision?? HIGHLY UNLIKELY.
Your wife (and you) should familiarize your selves with the family code - found here.
http://www.leginfo.ca.gov/cgi-bin/ca...body=&hits=All
Focus on Divisions Eight and Nine.