Icy Version 1.6.1.1
Java(TM) SE Runtime Environment 1.6.0_65-b14-466.1-11M4716 (64 bit)
Running on Mac OS X 10.10.3 (x86_64)
Max java memory : 1015.7 MB

Comment:
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Not enough memory !
Try to increase the Maximum Memory parameter in Preferences.
You can also report the error if you think it is not due to a memory problem.
java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Arrays.java:2786)
at icy.type.collection.array.Array1DUtil.copyOf(Array1DUtil.java:296)
at icy.imagej.ImageJUtil.convertToIcySequence(ImageJUtil.java:217)
at icy.action.GeneralActions$7.doAction(GeneralActions.java:288)
at icy.action.IcyAbstractAction$1.run(IcyAbstractAction.java:441)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:695)