diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/ActionScript2ClassDetector.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/ActionScript2ClassDetector.java
index 3eca2a6be..61117ef5a 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/ActionScript2ClassDetector.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/ActionScript2ClassDetector.java
@@ -336,7 +336,13 @@ public class ActionScript2ClassDetector {
 
                             try {
                                 if (!ifItem.onFalse.isEmpty()) {
-                                    throw new AssertException("else clause of the if is not empty");
+                                    //throw new AssertException("else clause of the if is not empty");
+                                    //Note: When there is an else block, it may mean
+                                    //that the class was too long to fit maximum of
+                                    //jump bytes so the jump target is other invalid location
+                                    //(usually negative - will probably lead to other SWF tags)
+
+                                    //so we will rather silently ignore onFalse section
                                 }
 
                                 List<String> classNamePath = pathToSearchInIfCond;
@@ -667,11 +673,6 @@ public class ActionScript2ClassDetector {
                                     }
                                 }
 
-                                //???? fid 963
-                                if (!ifItem.onFalse.isEmpty()) {
-                                    commands.addAll(pos + 1, ifItem.onFalse);
-                                }
-
                                 // goto next line and check next classes
                                 continue looppos;
                             } catch (AssertException ex) {