Crafting Calculator mostly works now - is missing features however.

crafting/CraftingCalculationFailure.java

@@ -0,0 +1,17 @@
+package appeng.crafting;
+
+import appeng.api.storage.data.IAEItemStack;
+
+public class CraftingCalculationFailure extends RuntimeException
+{
+
+	private static final long serialVersionUID = 654603652836724823L;
+
+	IAEItemStack missing;
+
+	public CraftingCalculationFailure(IAEItemStack what, long howMany) {
+		super( "this should have been caught!" );
+		missing = what.copy();
+		missing.setStackSize( howMany );
+	}
+}