exeption in thread main

[AmikadM]

i got this

Exception in thread "main" java.io.IOException: WiiUDiscContentsHeader MAGIC mismatch. at de.mas.wiiu.jnus.implementations.wud.content.WiiUDiscContentsHeader.parseData(WiiUDiscContentsHeader.java:39) at de.mas.wiiu.jnus.implementations.wud.content.WiiUContentsInformation.parseData(WiiUContentsInformation.java:22) at de.mas.wiiu.jnus.implementations.wud.header.WiiUDiscHeader.parseData(WiiUDiscHeader.java:25) at de.mas.wiiu.jnus.implementations.wud.WiiUDisc.parseData(WiiUDisc.java:20) at de.mas.wiiu.jnus.WUDLoader.load(WUDLoader.java:91) at de.mas.wiiu.jnus.WUDLoader.load(WUDLoader.java:69) at de.mas.jwudtool.Main.extract(Main.java:209) at de.mas.jwudtool.Main.main(Main.java:169)

plz help