What can I do to enforce a child educational provision that was part of our divorce settlement over 20 years ago

Divorce settlement from 20+ years ago.: What is my legal standing in going after an ex-spouse for a condition of our divorce that stipulated he is supposed to pay for college education of one child. The divorce occured 22 years ago. He can afford to pay, but currently has no assets in his own name, having transfered what he owns over to his live-in girlfriend. He has paid for a portion of our child's education, but student loans are now due, most in my son's name, one parent loan in mine. - Is this your question? Add additional information