diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6e9708740..68f597009 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,9 @@ All notable changes to this project will be documented in this file.
 - Simple editor - edit parameters of items inside buttons
 - Simple editor - add/remove frames in buttons, button timeline header
 
+### Fixed
+- [#2456] FLA export - NullPointer exception while exporting to CS4 or lower via commandline
+
 ### Fixed
 - Resize export dialogs labels to match localized strings
 - AS1/2 debugger - deletion of SWD file after debugging
@@ -3792,6 +3795,7 @@ Major version of SWF to XML export changed to 2.
 [alpha 9]: https://github.com/jindrapetrik/jpexs-decompiler/compare/alpha8...alpha9
 [alpha 8]: https://github.com/jindrapetrik/jpexs-decompiler/compare/alpha7...alpha8
 [alpha 7]: https://github.com/jindrapetrik/jpexs-decompiler/releases/tag/alpha7
+[#2456]: https://www.free-decompiler.com/flash/issues/2456
 [#2427]: https://www.free-decompiler.com/flash/issues/2427
 [#1826]: https://www.free-decompiler.com/flash/issues/1826
 [#2448]: https://www.free-decompiler.com/flash/issues/2448
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/xfl/XFLConverter.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/xfl/XFLConverter.java
index 113b5ac64..b31dbd991 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/xfl/XFLConverter.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/xfl/XFLConverter.java
@@ -6020,7 +6020,9 @@ public class XFLConverter {
         }
 
         if (cbfFlaVersion != null) {
-            progressListener.status("Converting to " + cbfFlaVersion + " ...");
+            if (progressListener != null) {
+                progressListener.status("Converting to " + cbfFlaVersion + " ...");
+            }
             try {
                 InputStorageInterface inputStorage = new ZippedInputStorage(new File(zipfile));
                 OutputStorageInterface outputStorage = new CfbOutputStorage(new File(outfile));