diff --git a/CHANGELOG.md b/CHANGELOG.md
index a787cea4b..7a425b0c0 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Refined Storage Changelog
 
+### 0.6.11
+**Bugfixes**
+- Fixed crafting patterns crashing when item of an input or output no longer exists
+
 ### 0.6.10
 **Bugfixes**
 - Fixed Processing Patterns not working
diff --git a/src/main/java/refinedstorage/gui/GuiCrafter.java b/src/main/java/refinedstorage/gui/GuiCrafter.java
index 197757b3d..c31c58803 100755
--- a/src/main/java/refinedstorage/gui/GuiCrafter.java
+++ b/src/main/java/refinedstorage/gui/GuiCrafter.java
@@ -49,7 +49,7 @@ public class GuiCrafter extends GuiBase {
             int x = 27;
             int y = 19 + (i * 18);
 
-            if (crafter.getStackInSlot(i) != null) {
+            if (crafter.getStackInSlot(i) != null && ItemPattern.isValid(crafter.getStackInSlot(i))) {
                 ItemStack pattern = crafter.getStackInSlot(i);
 
                 String text = t("gui.refinedstorage:crafter.processing");
diff --git a/src/main/java/refinedstorage/item/ItemPattern.java b/src/main/java/refinedstorage/item/ItemPattern.java
index 8829d0bc9..44386b296 100755
--- a/src/main/java/refinedstorage/item/ItemPattern.java
+++ b/src/main/java/refinedstorage/item/ItemPattern.java
@@ -65,7 +65,7 @@ public class ItemPattern extends ItemBase {
     }
 
     private static ItemStack[] get(ItemStack pattern, String type) {
-        if (!isValid(pattern)) {
+        if (!pattern.hasTagCompound() || !pattern.getTagCompound().hasKey(type)) {
             return null;
         }
 
@@ -81,10 +81,23 @@ public class ItemPattern extends ItemBase {
     }
 
     public static boolean isValid(ItemStack pattern) {
-        return pattern.getTagCompound() != null &&
-            pattern.getTagCompound().hasKey(NBT_INPUTS) &&
-            pattern.getTagCompound().hasKey(NBT_OUTPUTS) &&
-            pattern.getTagCompound().hasKey(NBT_PROCESSING);
+        if (pattern.getTagCompound() == null || (!pattern.getTagCompound().hasKey(NBT_INPUTS) || !pattern.getTagCompound().hasKey(NBT_OUTPUTS) || !pattern.getTagCompound().hasKey(NBT_PROCESSING))) {
+            return false;
+        }
+
+        for (ItemStack input : getInputs(pattern)) {
+            if (input == null) {
+                return false;
+            }
+        }
+
+        for (ItemStack output : getOutputs(pattern)) {
+            if (output == null) {
+                return false;
+            }
+        }
+
+        return true;
     }
 
     public static void setProcessing(ItemStack pattern, boolean processing) {
@@ -96,7 +109,7 @@ public class ItemPattern extends ItemBase {
     }
 
     public static boolean isProcessing(ItemStack pattern) {
-        if (pattern.getTagCompound() == null) {
+        if (!pattern.hasTagCompound() || !pattern.getTagCompound().hasKey(NBT_PROCESSING)) {
             return false;
         }
 
diff --git a/src/main/java/refinedstorage/tile/TileController.java b/src/main/java/refinedstorage/tile/TileController.java
index d81ba3b89..362b52b16 100755
--- a/src/main/java/refinedstorage/tile/TileController.java
+++ b/src/main/java/refinedstorage/tile/TileController.java
@@ -226,7 +226,7 @@ public class TileController extends TileBase implements IEnergyReceiver, ISynchr
                 TileCrafter crafter = (TileCrafter) machine;
 
                 for (int i = 0; i < TileCrafter.PATTERN_SLOTS; ++i) {
-                    if (crafter.getStackInSlot(i) != null) {
+                    if (crafter.getStackInSlot(i) != null && ItemPattern.isValid(crafter.getStackInSlot(i))) {
                         ItemStack pattern = crafter.getStackInSlot(i);
 
                         patterns.add(new CraftingPattern(crafter.getPos().getX(), crafter.getPos().getY(), crafter.getPos().getZ(), ItemPattern.isProcessing(pattern), ItemPattern.getInputs(pattern), ItemPattern.getOutputs(pattern)));
@@ -502,13 +502,17 @@ public class TileController extends TileBase implements IEnergyReceiver, ISynchr
             for (int i = 0; i < taskList.tagCount(); ++i) {
                 NBTTagCompound taskTag = taskList.getCompoundTagAt(i);
 
-                switch (taskTag.getInteger("Type")) {
-                    case BasicCraftingTask.ID:
-                        addCraftingTask(new BasicCraftingTask(taskTag));
-                        break;
-                    case ProcessingCraftingTask.ID:
-                        addCraftingTask(new ProcessingCraftingTask(taskTag));
-                        break;
+                CraftingPattern pattern = CraftingPattern.readFromNBT(taskTag.getCompoundTag(CraftingPattern.NBT));
+
+                if (pattern != null) {
+                    switch (taskTag.getInteger("Type")) {
+                        case BasicCraftingTask.ID:
+                            addCraftingTask(new BasicCraftingTask(taskTag, pattern));
+                            break;
+                        case ProcessingCraftingTask.ID:
+                            addCraftingTask(new ProcessingCraftingTask(taskTag, pattern));
+                            break;
+                    }
                 }
             }
         }
diff --git a/src/main/java/refinedstorage/tile/autocrafting/CraftingPattern.java b/src/main/java/refinedstorage/tile/autocrafting/CraftingPattern.java
index 2aad2a453..d5ea08b3e 100755
--- a/src/main/java/refinedstorage/tile/autocrafting/CraftingPattern.java
+++ b/src/main/java/refinedstorage/tile/autocrafting/CraftingPattern.java
@@ -80,14 +80,24 @@ public class CraftingPattern {
 
         NBTTagList inputsTag = tag.getTagList(ItemPattern.NBT_INPUTS, Constants.NBT.TAG_COMPOUND);
         ItemStack inputs[] = new ItemStack[inputsTag.tagCount()];
+
         for (int i = 0; i < inputsTag.tagCount(); ++i) {
             inputs[i] = ItemStack.loadItemStackFromNBT(inputsTag.getCompoundTagAt(i));
+
+            if (inputs[i] == null) {
+                return null;
+            }
         }
 
         NBTTagList outputsTag = tag.getTagList(ItemPattern.NBT_OUTPUTS, Constants.NBT.TAG_COMPOUND);
         ItemStack outputs[] = new ItemStack[outputsTag.tagCount()];
+
         for (int i = 0; i < outputsTag.tagCount(); ++i) {
             outputs[i] = ItemStack.loadItemStackFromNBT(outputsTag.getCompoundTagAt(i));
+
+            if (outputs[i] == null) {
+                return null;
+            }
         }
 
         return new CraftingPattern(cx, cy, cz, processing, inputs, outputs);
diff --git a/src/main/java/refinedstorage/tile/autocrafting/task/BasicCraftingTask.java b/src/main/java/refinedstorage/tile/autocrafting/task/BasicCraftingTask.java
index a7562acad..c5f94c0ff 100755
--- a/src/main/java/refinedstorage/tile/autocrafting/task/BasicCraftingTask.java
+++ b/src/main/java/refinedstorage/tile/autocrafting/task/BasicCraftingTask.java
@@ -33,8 +33,8 @@ public class BasicCraftingTask implements ICraftingTask {
         this.childTasks = new boolean[pattern.getInputs().length];
     }
 
-    public BasicCraftingTask(NBTTagCompound tag) {
-        this.pattern = CraftingPattern.readFromNBT(tag.getCompoundTag(CraftingPattern.NBT));
+    public BasicCraftingTask(NBTTagCompound tag, CraftingPattern pattern) {
+        this.pattern = pattern;
         this.satisfied = RefinedStorageUtils.readBooleanArray(tag, NBT_SATISFIED);
         this.checked = RefinedStorageUtils.readBooleanArray(tag, NBT_CHECKED);
         this.childTasks = RefinedStorageUtils.readBooleanArray(tag, NBT_CHILD_TASKS);
diff --git a/src/main/java/refinedstorage/tile/autocrafting/task/ProcessingCraftingTask.java b/src/main/java/refinedstorage/tile/autocrafting/task/ProcessingCraftingTask.java
index c5676e532..4fac83b16 100755
--- a/src/main/java/refinedstorage/tile/autocrafting/task/ProcessingCraftingTask.java
+++ b/src/main/java/refinedstorage/tile/autocrafting/task/ProcessingCraftingTask.java
@@ -30,8 +30,8 @@ public class ProcessingCraftingTask implements ICraftingTask {
         this.satisfied = new boolean[pattern.getOutputs().length];
     }
 
-    public ProcessingCraftingTask(NBTTagCompound tag) {
-        this.pattern = CraftingPattern.readFromNBT(tag.getCompoundTag(CraftingPattern.NBT));
+    public ProcessingCraftingTask(NBTTagCompound tag, CraftingPattern pattern) {
+        this.pattern = pattern;
         this.inserted = RefinedStorageUtils.readBooleanArray(tag, NBT_INSERTED);
         this.childTasks = RefinedStorageUtils.readBooleanArray(tag, NBT_CHILD_TASKS);
         this.satisfied = RefinedStorageUtils.readBooleanArray(tag, NBT_SATISFIED);