Catches a potential error when starting a new session

src/main/java/net/knarcraft/blacksmith/trait/BlacksmithTrait.java

@@ -94,7 +94,12 @@ public class BlacksmithTrait extends CustomTrait<BlacksmithSetting> {
 
         //Start a new reforge session for the player
         currentSessionStartTime = System.currentTimeMillis();
-        session = new ReforgeSession(this, player, npc, config);
+        try {
+            session = new ReforgeSession(this, player, npc, config);
+        } catch (IllegalArgumentException exception) {
+            BlacksmithPlugin.error(exception.getMessage());
+            return;
+        }
 
         //Tell the player the cost of repairing the item
         String cost = EconomyManager.formatBlacksmithCost(player);

src/main/java/net/knarcraft/blacksmith/trait/ScrapperTrait.java

@@ -109,8 +109,13 @@ public class ScrapperTrait extends CustomTrait<ScrapperSetting> {
 
         //Start a new scrapper session for the player
         currentSessionStartTime = System.currentTimeMillis();
-        session = new SalvageSession(this, player, npc, getSettings(), result.salvage(),
-                result.salvageMethod(), result.requiredAmount());
+        try {
+            session = new SalvageSession(this, player, npc, getSettings(), result.salvage(),
+                    result.salvageMethod(), result.requiredAmount());
+        } catch (IllegalArgumentException exception) {
+            BlacksmithPlugin.error(exception.getMessage());
+            return;
+        }
         // Print the cost to the player
         printCostMessage(player, itemInHand, EconomyManager.formatSalvageCost(result.salvageMethod()),
                 result.salvageMethod());