title: Regular expression error: "Invalid Regular Expression"
body: <p>Below is the latest version of the regular expression I am using and it is throwing the error "Invalid Regular Expression."</p>
  
  <blockquote>
    <p>XSD: The regular expression <code>'^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[^\da-zA-Z]).{10,15}$'</code> failed to validate at location 4: This expression is not supported in the current option setting.</p>
  </blockquote>
  
  <p>I'm getting this exception in my xsd file and I'm developing this xsd in message broker (IIB). Can anyone help to me how to resolve this ?</p>