diff --git a/gortools/src/main/scala/gorsat/Analysis/GorQueen.scala b/gortools/src/main/scala/gorsat/Analysis/GorQueen.scala
index 3bbc75e4..0dc3adc9 100644
--- a/gortools/src/main/scala/gorsat/Analysis/GorQueen.scala
+++ b/gortools/src/main/scala/gorsat/Analysis/GorQueen.scala
@@ -174,7 +174,7 @@ object GorQueen {
 */
         val GTS1length = bui.outputBucketID.length
         val outputSize2 = bui.outputBucketID2.length
-        val IDX1 = new Array[Int](outputSize2)
+        val IDX1 = new Array[Int](GTS1length)
         val GTS2 = new Array[Char](outputSize2)
         var IDX1size : Int = 0