diff --git a/src/me/ByteEdit/main/Assembler.java b/src/me/ByteEdit/main/Assembler.java
index 8287156..1d5b817 100644
--- a/src/me/ByteEdit/main/Assembler.java
+++ b/src/me/ByteEdit/main/Assembler.java
@@ -942,7 +942,7 @@ public class Assembler {
 				return new InsnNode(131);
 			}
 			case "iinc": {
-				return new IincInsnNode(Integer.parseInt(split[1]), Integer.parseInt(split[3]));
+				return new IincInsnNode(Integer.parseInt(split[1]), Integer.parseInt(split[2]));
 			}
 			case "i2l": {
 				return new InsnNode(133);
diff --git a/src/me/ByteEdit/main/Disassembler.java b/src/me/ByteEdit/main/Disassembler.java
index a5766e4..24bca7c 100644
--- a/src/me/ByteEdit/main/Disassembler.java
+++ b/src/me/ByteEdit/main/Disassembler.java
@@ -530,7 +530,7 @@ public class Disassembler {
 			}
 			case "IincInsnNode": {
 				IincInsnNode node = (IincInsnNode) n;
-				s += "\t\t" + OpcodesReverse.reverseOpcode(n.getOpcode()) + " " + node.var + " -> " + node.incr + "\n";
+				s += "\t\t" + OpcodesReverse.reverseOpcode(n.getOpcode()) + " " + node.var + " " + node.incr + "\n";
 				break;
 			}
 			default:
diff --git a/src/me/ByteEdit/main/Main.java b/src/me/ByteEdit/main/Main.java
index f7c8622..1370e70 100644
--- a/src/me/ByteEdit/main/Main.java
+++ b/src/me/ByteEdit/main/Main.java
@@ -261,6 +261,7 @@ public class Main extends JFrame {
 						isChangingFile = false;
 					} catch (Throwable t) {
 						t.printStackTrace();
+						showError(t);
 					}
 				}
 			}
@@ -351,6 +352,7 @@ public class Main extends JFrame {
 					return;
 				} catch (Throwable t) {
 					t.printStackTrace();
+					showError(t);
 				}
 				dtde.rejectDrop();
 
@@ -454,11 +456,23 @@ public class Main extends JFrame {
 				}
 				isChangingFile = false;
 			}
-		} catch (IOException e) {
+		} catch (Throwable e) {
 			e.printStackTrace();
+			showError(e);
 		}
 	}
 
+	public void showError(Throwable e) {
+		String s = e.toString() + "\n";
+		StackTraceElement[] stackTrace = e.getStackTrace();
+		for (StackTraceElement ste : stackTrace) {
+			if (ste.getClassName().startsWith("java"))
+				break;
+			s += "\tat " + ste + "\n";
+		}
+		JOptionPane.showMessageDialog(this, s, "Error!", JOptionPane.ERROR_MESSAGE);
+	}
+
 	class ArchiveTreeModel extends DefaultTreeModel {
 
 		public ArchiveTreeModel(JarFile jar) {
@@ -513,10 +527,11 @@ public class Main extends JFrame {
 						currentNode = nextNode;
 					}
 				}
-			} catch (IOException e) {
+			} catch (Throwable e) {
 				classNodes.clear();
 				OTHER_FILES.clear();
 				e.printStackTrace();
+				showError(e);
 			}
 		}