Exception in DTED layer

I was trying to display some DTED data at 19,000,000 scale and I got this
exception. Anyone have any idea what is going on?

java.lang.NumberFormatException:
        at java.lang.Integer.parseInt(Integer.java:426)
        at com.bbn.openmap.layer.dted.DTEDFrameDSI.<init>(Unknown Source)
        at com.bbn.openmap.layer.dted.DTEDFrame.read(Unknown Source)
        at com.bbn.openmap.layer.dted.DTEDFrame.<init>(Unknown Source)
        at com.bbn.openmap.layer.dted.DTEDFrame.<init>(Unknown Source)
        at com.bbn.openmap.layer.dted.DTEDFrameCache.load(Unknown Source)
        at com.bbn.openmap.layer.util.cacheHandler.CacheHandler.get(Unknown
Source)
        at com.bbn.openmap.layer.dted.DTEDFrameCache.get(Unknown Source)
        at com.bbn.openmap.layer.dted.DTEDCacheHandler.getNextImage(Unknown
Source)
        at com.bbn.openmap.layer.dted.DTEDCacheManager.getRectangle(Unknown
Source)
        at com.bbn.openmap.layer.dted.DTEDLayer.prepare(Unknown Source)
        at com.bbn.openmap.layer.dted.DTEDLayer$DTEDWorker.construct(Unknown
Source)
        at com.bbn.openmap.util.SwingWorker$2.run(Unknown Source)
        at java.lang.Thread.run(Thread.java:536)

I have look a bit at the DTED source but not enough to begin tracking this
down.

Thanks,
Eric

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