diff --git a/src/main/java/com/glodblock/github/common/tile/TileLevelMaintainer.java b/src/main/java/com/glodblock/github/common/tile/TileLevelMaintainer.java
index a3defdd9..d1d3183b 100644
--- a/src/main/java/com/glodblock/github/common/tile/TileLevelMaintainer.java
+++ b/src/main/java/com/glodblock/github/common/tile/TileLevelMaintainer.java
@@ -441,7 +441,11 @@ public class TileLevelMaintainer extends AENetworkTile
                 if (tag == null || !tag.hasKey(NBT_STACK)) {
                     this.requests[i] = null;
                 } else if (this.requests[i] == null) {
-                    this.requests[i] = new RequestInfo(tag, this);
+                    try {
+                        this.requests[i] = new RequestInfo(tag, this);
+                    } catch (Exception ignored) {
+                        this.requests[i] = null;
+                    }
                 } else {
                     this.requests[i].loadFromNBT(tag);
                 }
@@ -598,9 +602,12 @@ public class TileLevelMaintainer extends AENetworkTile
             job = null;
         }
 
-        public RequestInfo(NBTTagCompound tag, TileLevelMaintainer tile) {
+        public RequestInfo(NBTTagCompound tag, TileLevelMaintainer tile) throws IllegalArgumentException {
             this.tile = tile;
             itemStack = AEItemStack.loadItemStackFromNBT(tag.getCompoundTag(NBT_STACK));
+            if (itemStack == null) {
+                throw new IllegalArgumentException("ItemStack cannot be null!");
+            }
             quantity = tag.getLong(NBT_QUANTITY);
             batchSize = tag.getLong(NBT_BATCH);
             enable = tag.getBoolean(NBT_ENABLE);
diff --git a/src/main/java/com/glodblock/github/crossmod/waila/tile/LevelMaintainerWailaDataProvider.java b/src/main/java/com/glodblock/github/crossmod/waila/tile/LevelMaintainerWailaDataProvider.java
index 20b01d35..297c8d46 100644
--- a/src/main/java/com/glodblock/github/crossmod/waila/tile/LevelMaintainerWailaDataProvider.java
+++ b/src/main/java/com/glodblock/github/crossmod/waila/tile/LevelMaintainerWailaDataProvider.java
@@ -31,16 +31,17 @@ public class LevelMaintainerWailaDataProvider extends BaseWailaDataProvider {
                     NBTTagCompound tag = tagList.getCompoundTagAt(i);
                     if (tag == null || !tag.hasKey(TileLevelMaintainer.NBT_STACK)) continue;
 
-                    TileLevelMaintainer.RequestInfo request = new TileLevelMaintainer.RequestInfo(
-                            tag,
-                            tileLevelMaintainer);
-                    currentToolTip.add(
-                            Tooltip.tileLevelMaintainerFormat(
-                                    request.getAEItemStack().getItemStack().getDisplayName(),
-                                    request.getQuantity(),
-                                    request.getBatchSize(),
-                                    request.isEnable()));
-
+                    try {
+                        TileLevelMaintainer.RequestInfo request = new TileLevelMaintainer.RequestInfo(
+                                tag,
+                                tileLevelMaintainer);
+                        currentToolTip.add(
+                                Tooltip.tileLevelMaintainerFormat(
+                                        request.getAEItemStack().getItemStack().getDisplayName(),
+                                        request.getQuantity(),
+                                        request.getBatchSize(),
+                                        request.isEnable()));
+                    } catch (Exception ignored) {}
                 }
             }
         }