[OpenMap Users] AbstractGraphicLoader glitch

Hello openmap-users and team,
Periodically in random intervals I get this error message using
AbstractGraphicLoader:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at com.bbn.openmap.omGraphics.OMArc.generate(OMArc.java:780)
    at com.bbn.openmap.layer.location.Location.generate(Location.java:582)
    at ru.igis.omtab.RuNA.manageGraphics(RuNA.java:77)
    at
com.bbn.openmap.graphicLoader.AbstractGraphicLoader.actionPerformed(AbstractGraphicLoader.java:182)
    at javax.swing.Timer.fireActionPerformed(Unknown Source)
    at javax.swing.Timer$DoPostEvent.run(Unknown Source)

What can be cause of this? Is there any remedy to this?
Any help would be greatly appreciated.

-- 
Sinscerely,
	Ru
Ruslan P. Sorokin sorokin@oogis.ru
OOGIS RL          http://www.oogis.ru
SPIIRAS           http://www.spiiras.nw.ru
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