Won't show errors if a card has no setinfo.

src/main/java/forge/card/CardDb.java

@@ -39,8 +39,6 @@ public final class CardDb {
             }
         }
     }
-    private static List<String> skippedCards = new ArrayList<String>();
-    public static List<String> getSkippedCards() { return skippedCards; }
 
     // Here oracle cards
     private final Map<String, CardRules> cards = new Hashtable<String, CardRules>();
@@ -63,17 +61,13 @@ public final class CardDb {
 
     private CardDb(final Iterator<CardRules> parser) {
         while (parser.hasNext()) {
-            CardRules nextCard = parser.next();
-            boolean wasAdded = addNewCard(nextCard);
-            if (!wasAdded) {
-                skippedCards.add(nextCard.getName());
-            }
+            addNewCard(parser.next());
         }
         // TODO: consider using Collections.unmodifiableList wherever possible
     }
 
-    public boolean addNewCard(final CardRules card) {
-        if (null == card) { return true; } // consider that a success
+    public void addNewCard(final CardRules card) {
+        if (null == card) { return; } // consider that a success
         //System.out.println(card.getName());
         String cardName = card.getName().toLowerCase();
 
@@ -101,12 +95,7 @@ public final class CardDb {
                 cardCopies[i] = lastAdded;
             }
         }
-
-        if (null != lastAdded) {
-            uniqueCards.put(cardName, lastAdded);
-            return true;
-        }
-        return false;
+        uniqueCards.put(cardName, lastAdded);
     }
 
     // Single fetch

src/main/java/forge/card/CardRarity.java

@@ -13,7 +13,8 @@ public enum CardRarity {
     Uncommon("U"),
     Rare("R"),
     MythicRare("M"),
-    Special("S"); // Timeshifted
+    Special("S"), // Timeshifted
+    Unknown("?"); // In development
 
     private final String strValue;
     private CardRarity(final String sValue) {

src/main/java/forge/card/CardRules.java

@@ -86,6 +86,10 @@ public final class CardRules {
         } else if (cardType.isPlaneswalker()) {
             this.loyalty = ptLine;
         }
+
+        if (setsData.isEmpty()) {
+            setsData.put("???", new CardInSet(CardRarity.Unknown, 1));
+        }
         setsPrinted = setsData;
     }
 

src/main/java/forge/card/cardFactory/PreloadingCardFactory.java

@@ -82,11 +82,6 @@ public class PreloadingCardFactory extends AbstractCardFactory {
         read.run();
         CardDb.setup(listCardRules.iterator());
 
-        List<String> skipped = CardDb.getSkippedCards();
-        if (!skipped.isEmpty()) {
-            String message = String.format("The following cards are lacking of correct SetInfo: %s", StringUtils.join(skipped, ", "));
-            ErrorViewer.showError(message);
-        }
     } // readCard()
 
 } //end class PreloadingCardFactory