on exit: java.util.concurrent.ExecutionException: java.lang.NullPointerException

[22:07:12] [Server thread/ERROR] [extracells]: Skipping event FMLServerStoppedEv
ent and marking errored mod extracells since required dependency appliedenergist
ics2 has errored
[22:07:17] [Server thread/ERROR] [FTBU]: Skipping event FMLServerStoppedEvent an
d marking errored mod FTBU since required dependency FTBL has errored
[22:07:17] [Server thread/ERROR] [FTBI]: Skipping event FMLServerStoppedEvent an
d marking errored mod FTBI since required dependency FTBU has errored
[22:07:17] [Server thread/INFO] [mcjty.lib.varia.Logging]: RFTools: server is st
opping. Shutting down gracefully
[22:07:17] [Server thread/ERROR] [thaumicenergistics]: Skipping event FMLServerS
toppedEvent and marking errored mod thaumicenergistics since required dependency
 appliedenergistics2 has errored
[22:07:17] [Server thread/INFO] [FML]: The state engine was in incorrect state E
RRORED and forced into state SERVER_STOPPED. Errors may have been discarded.
[22:07:17] [Server thread/INFO] [FML]: The state engine was in incorrect state E
RRORED and forced into state AVAILABLE. Errors may have been discarded.
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