If you are looking for the decompiler itself, visit https://github.com/jindrapetrik/jpexs-decompiler
NEW : We have got a new blog where we post some interesting SWF internals info.

#1865 ConcurrentModificationException on SWF close
Author:
STA20

Date created:
Type: bug
Visibility: Everybody
Assigned to:
Labels: GUI
State: closed 

> What steps will reproduce the problem?
Open the file, click on Images, then close file.
> What is the expected output? What do you see instead?
SEVERE Uncaught exception in thread: calculateMissingNeededThread
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
at java.util.ArrayList$Itr.next(Unknown Source)
at
com.jpexs.decompiler.flash.gui.MainPanel.calculateMissingNeededCharacters(MainPanel.java:4
749)
at
com.jpexs.decompiler.flash.gui.MainPanel.calculateMissingNeededCharacters(MainPanel.java:4
752)
at
com.jpexs.decompiler.flash.gui.MainPanel.calculateMissingNeededCharacters(MainPanel.java:4
762)
at com.jpexs.decompiler.flash.gui.MainPanel$8.run(MainPanel.java:1014)
> What version of the product are you using? Is it "nightly build"? Which operating system
do you have?
v.16.2.0 stable, didn't try on latest nightly, it may be fixed there.
Win 7
> Please provide any additional information below. If the problem is related to a SWF
file, attach it here, otherwise we can't help you.
Also may happen if simply browsing shapes/sprites/images, or using Remove on a large
number of them.

This should be fixed in nightly 2172.
State: new→upgraded
Title: exception→ConcurrentModificationException on SWF close
Title: exception→ConcurrentModificationException on SWF close
TY, it's fixed, and can be closed.
State: upgraded→closed