[Ajuda] Exception in thread "AWT-EventQueue-0" java.lang.UnsatisfiedLinkError: org.opencv.core.Mat.n_Mat()J

Ola!

Sou estudante, beem iniciante, e o professor passou um código para estudar, e está dando este erro:

Exception in thread "AWT-EventQueue-0" java.lang.UnsatisfiedLinkError: org.opencv.core.Mat.n_Mat()J
	at org.opencv.core.Mat.n_Mat(Native Method)
	at org.opencv.core.Mat.<init>(Mat.java:447)
	at gui.recCara.<init>(recCara.java:63)
	at gui.recCara$15.run(recCara.java:789)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.awt.EventQueue$3.run(EventQueue.java:703)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

É um reconhecedor de face. Utilizo opencv - Java Netbeans

Só queria ter uma ideia do que possa ser.

Está usando o -Djava.library.path="caminho da pasta onde estão as DLLs do Open CV" ?