System.err.println("warning: operation not found: " + s);
iRuntime.bomb("operation not found: " + s);
public static vDescriptor resolveProc(String s, int args) {    if (args < 1 || args > 3) {	iRuntime.error(901);    }    vDescriptor v = (vDescriptor) proctab[args-1].get(s);    if (v == null) {	v = vNull.New();	// diagnose missing operators (implementation bug):	char c = s.charAt(0);	if (c != '_' && ! Character.isLetter(c)) {	    System.err.println("warning: operation not found: " + s);	}    }    return v;}