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--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal>In X3DConcreteNode.java, I think this URL needs to be commented out (see highlighted red):</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>protected final void setConcreteUSE(String newValue)</p><p class=MsoNormal> {</p><p class=MsoNormal> if (newValue == null)</p><p class=MsoNormal> newValue = new String(); // Principle of Least Astonishment (POLA)</p><p class=MsoNormal> <span style='color:red'>https://en.wikipedia.org/wiki/Principle_of_least_astonishment</span></p><p class=MsoNormal> </p><p class=MsoNormal> // Check that newValue parameter meets naming requirements before assigning to scene graph</p><p class=MsoNormal> if (!newValue.isEmpty() && !org.web3d.x3d.jsail.fields.SFStringObject.isNMTOKEN(newValue))</p><p class=MsoNormal> {</p><p class=MsoNormal> throw new org.web3d.x3d.sai.InvalidFieldValueException(getElementName() + " USE newValue=\"" + newValue +</p><p class=MsoNormal> "\" has an illegal value, must provide a valid NMTOKEN name string.");</p><p class=MsoNormal> }</p><p class=MsoNormal> USE = newValue;</p><p class=MsoNormal> }<o:p></o:p></p></div></body></html>