diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionConstantPool.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionConstantPool.java
index fd3f3ed0e..fdfbf6afd 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionConstantPool.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionConstantPool.java
@@ -77,8 +77,12 @@ public class ActionConstantPool extends Action {
      */
     @Override
     protected int getContentBytesLength() {
+        return calculateSize(constantPool);
+    }
+
+    public static int calculateSize(List<String> strings) {
         int res = 2;
-        for (String s : constantPool) {
+        for (String s : strings) {
             res += Utf8Helper.getBytesLength(s) + 1;
         }
 
diff --git a/src/com/jpexs/decompiler/flash/gui/action/ActionPanel.java b/src/com/jpexs/decompiler/flash/gui/action/ActionPanel.java
index 5f25d66ff..511e1e50f 100644
--- a/src/com/jpexs/decompiler/flash/gui/action/ActionPanel.java
+++ b/src/com/jpexs/decompiler/flash/gui/action/ActionPanel.java
@@ -30,6 +30,7 @@ import com.jpexs.decompiler.flash.action.parser.script.ParsedSymbol;
 import com.jpexs.decompiler.flash.action.parser.script.SymbolType;
 import com.jpexs.decompiler.flash.action.swf4.ActionPush;
 import com.jpexs.decompiler.flash.action.swf4.ConstantIndex;
+import com.jpexs.decompiler.flash.action.swf5.ActionConstantPool;
 import com.jpexs.decompiler.flash.configuration.Configuration;
 import com.jpexs.decompiler.flash.exporters.modes.ScriptExportMode;
 import com.jpexs.decompiler.flash.gui.AppStrings;
@@ -786,7 +787,16 @@ public class ActionPanel extends JPanel implements SearchListener<ActionSearchRe
             if (trimmed.startsWith(Helper.hexData)) {
                 src.setActionBytes(Helper.getBytesFromHexaText(text));
             } else if (trimmed.startsWith(Helper.constants)) {
-                src.setConstantPools(Helper.getConstantPoolsFromText(text));
+                List<List<String>> constantPools = Helper.getConstantPoolsFromText(text);
+                for (int i = 0; i < constantPools.size(); i++) {
+                    List<String> constantPool = constantPools.get(i);
+                    int size = ActionConstantPool.calculateSize(constantPool);
+                    if (size > 0xffff) {
+                        View.showMessageDialog(this, AppStrings.translate("error.constantPoolTooBig").replace("%index%", Integer.toString(i)).replace("%size%", Integer.toString(size)), AppStrings.translate("error"), JOptionPane.ERROR_MESSAGE);
+                    }
+                }
+
+                src.setConstantPools(constantPools);
             } else {
                 src.setActions(ASMParser.parse(0, true, text, src.getSwf().version, false));
             }
@@ -806,6 +816,8 @@ public class ActionPanel extends JPanel implements SearchListener<ActionSearchRe
             editor.gotoLine((int) ex.line);
             editor.markError();
             View.showMessageDialog(this, AppStrings.translate("error.action.save").replace("%error%", ex.text).replace("%line%", Long.toString(ex.line)), AppStrings.translate("error"), JOptionPane.ERROR_MESSAGE);
+        } catch (Throwable ex) {
+            logger.log(Level.SEVERE, null, ex);
         }
     }
 
diff --git a/src/com/jpexs/decompiler/flash/gui/locales/MainFrame.properties b/src/com/jpexs/decompiler/flash/gui/locales/MainFrame.properties
index ea39a2ebc..8ad471245 100644
--- a/src/com/jpexs/decompiler/flash/gui/locales/MainFrame.properties
+++ b/src/com/jpexs/decompiler/flash/gui/locales/MainFrame.properties
@@ -623,3 +623,5 @@ filter.linuxExe = Linux Executable files
 
 import.script.result = %count% scripts imported.
 import.script.as12warning = Import script can import only AS1/2 scripts.
+
+error.constantPoolTooBig = Constant pool is too big. index=%index%, size=%size%
diff --git a/src/com/jpexs/decompiler/flash/gui/locales/MainFrame_hu.properties b/src/com/jpexs/decompiler/flash/gui/locales/MainFrame_hu.properties
index 9e6a6605f..228452542 100644
--- a/src/com/jpexs/decompiler/flash/gui/locales/MainFrame_hu.properties
+++ b/src/com/jpexs/decompiler/flash/gui/locales/MainFrame_hu.properties
@@ -622,3 +622,5 @@ filter.linuxExe = Linux futtathat\u00f3 f\u00e1jlok
 
 import.script.result = %count% szkript import\u00e1lva.
 import.script.as12warning = A szkript import\u00e1l\u00e1s csak AS1/2 szkriptekre m\u0171k\u00f6dik.
+
+error.constantPoolTooBig = Karakter l\u00e1nc t\u00e1rol\u00f3 t\u00fal nagy. index=%index%, m\u00e9ret=%size%