diff --git a/src/main/scala/firrtl/LoweringCompilers.scala b/src/main/scala/firrtl/LoweringCompilers.scala
index f9475c7..04df711 100644
--- a/src/main/scala/firrtl/LoweringCompilers.scala
+++ b/src/main/scala/firrtl/LoweringCompilers.scala
@@ -113,11 +113,11 @@ class LabelChecking extends CoreTransform {
   def outputForm = HighForm
   def passSeq =  Seq(
     passes.PropNodes,
-    passes.LabelMPorts,
+    // passes.LabelMPorts,
+    passes.LabelExprs,
     passes.DepsToWorkingIR, 
     passes.DepsResolveKinds, 
     passes.DepsInferTypes,
-    passes.LabelExprs,
     passes.DeterminePC,
     passes.NextCycleTransform,
     passes.SeqPortGenNext,
diff --git a/src/main/scala/firrtl/passes/labelchecking/ConstraintGen.scala b/src/main/scala/firrtl/passes/labelchecking/ConstraintGen.scala
index cad4d4a..0f00c0c 100644
--- a/src/main/scala/firrtl/passes/labelchecking/ConstraintGen.scala
+++ b/src/main/scala/firrtl/passes/labelchecking/ConstraintGen.scala
@@ -273,8 +273,22 @@ object BVConstraintGen extends ConstraintGenerator {
       val idx = CBVLit(ex.value, toBInt(vec_size(ex.exp.tpe)))
       CASelect(refToIdent(ex.exp), idx).serialize
     case ex: WSubAccess => 
-      val idx = exprToCons(ex.index, toBInt(vec_size(ex.exp.tpe)))
-      CASelect(refToIdent(ex.exp), idx).serialize
+      // try {
+      //   toBInt(vec_size(ex.exp.tpe))
+      // } catch {
+      //   case (t: Throwable) =>
+      //   println(s"sub_access causing excp: ${ex.serialize}")
+      //   println(s"sub_access.exp causing excp: ${ex.exp.serialize}")
+      //   t
+      // }
+      try {
+        val idx = exprToCons(ex.index, toBInt(vec_size(ex.exp.tpe)))
+        CASelect(refToIdent(ex.exp), idx).serialize
+      } catch { 
+        case (t: Exception) =>
+          val idx = exprToCons(ex.index)
+          CASelect(refToIdent(ex.exp), idx).serialize
+      }
     case WRef(name,_,_,_,_) => name
     case WSubField(exp,name,_,_,_) => s"(field_$name ${refToIdent(exp)})"
     case ex: Mux =>
diff --git a/src/main/scala/firrtl/passes/labelchecking/DepExprPasses.scala b/src/main/scala/firrtl/passes/labelchecking/DepExprPasses.scala
index c520d7f..3017e0f 100644
--- a/src/main/scala/firrtl/passes/labelchecking/DepExprPasses.scala
+++ b/src/main/scala/firrtl/passes/labelchecking/DepExprPasses.scala
@@ -22,7 +22,7 @@ object DepsToWorkingIR extends Pass with PassDebug {
   }
   def toLblComp(lc: LabelComp): LabelComp = lc map toExp map toLblComp
 
-  def toExp(e: Expression): Expression = e map toExp match {
+  def toExp(e: Expression): Expression = e map toExp map toLbl match {
     case ex: Reference => WRef(ex.name, ex.tpe, ex.lbl, NodeKind, UNKNOWNGENDER)
     case ex: SubField => WSubField(ex.expr, ex.name, ex.tpe, ex.lbl, UNKNOWNGENDER)
     case ex: SubIndex => WSubIndex(ex.expr, ex.value, ex.tpe, ex.lbl, UNKNOWNGENDER)
@@ -30,10 +30,7 @@ object DepsToWorkingIR extends Pass with PassDebug {
     case ex => ex // This might look like a case to use case _ => e, DO NOT!
   }
 
-  def toExpL(e: Expression): Expression =
-    toExp(e) map toExpL map toLbl
-
-  def toStmt(s: Statement): Statement = s map toExpL map toLbl match {
+  def toStmt(s: Statement): Statement = s map toExp map toLbl match {
     case sx: DefInstance => WDefInstance(sx.info, sx.name, sx.module, UnknownType, UnknownLabel)
     case sx => sx map toStmt
   }
diff --git a/src/main/scala/firrtl/passes/labelchecking/LabelCheck.scala b/src/main/scala/firrtl/passes/labelchecking/LabelCheck.scala
index c3a296d..fb79d9f 100644
--- a/src/main/scala/firrtl/passes/labelchecking/LabelCheck.scala
+++ b/src/main/scala/firrtl/passes/labelchecking/LabelCheck.scala
@@ -252,7 +252,8 @@ object LabelCheck extends Pass with PassDebug {
       emit(s"(assert (not (leqc ${ser(C(rhs) join C(pc))} ${ser(C(lhs))}) ) )\n")
       } catch {
         case (t: Exception) =>
-          throw new Exception(s"${info}: ${t.getMessage}")
+          println(s"Exception at source line ${info}")
+          throw t
       }
       emit("(check-sat)\n")
       emit("(pop)\n")