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diff --git a/src/aig/saig/saigDup.c b/src/aig/saig/saigDup.c
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+++ b/src/aig/saig/saigDup.c
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+/**CFile****************************************************************
+
+  FileName    [saigDup.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Sequential AIG package.]
+
+  Synopsis    [Various duplication procedures.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - June 20, 2005.]
+
+  Revision    [$Id: saigDup.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "saig.h"
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Duplicates while ORing the POs of sequential circuit.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Aig_Man_t * Said_ManDupOrpos( Aig_Man_t * pAig )
+{
+    Aig_Man_t * pAigNew;
+    Aig_Obj_t * pObj, * pMiter;
+    int i;
+    // start the new manager
+    pAigNew = Aig_ManStart( Aig_ManNodeNum(pAig) );
+    // map the constant node
+    Aig_ManConst1(pAig)->pData = Aig_ManConst1( pAigNew );
+    // create variables for PIs
+    Aig_ManForEachPi( pAig, pObj, i )
+        pObj->pData = Aig_ObjCreatePi( pAigNew );
+    // add internal nodes of this frame
+    Aig_ManForEachNode( pAig, pObj, i )
+        pObj->pData = Aig_And( pAigNew, Aig_ObjChild0Copy(pObj), Aig_ObjChild1Copy(pObj) );
+    // create PO of the circuit
+    pMiter = Aig_ManConst0( pAigNew );
+    Saig_ManForEachPo( pAig, pObj, i )
+        pMiter = Aig_Or( pAigNew, pMiter, Aig_ObjChild0Copy(pObj) );
+    Aig_ObjCreatePo( pAigNew, pMiter );
+    // transfer to register outputs
+    Saig_ManForEachLi( pAig, pObj, i )
+        Aig_ObjCreatePo( pAigNew, Aig_ObjChild0Copy(pObj) );
+    Aig_ManCleanup( pAigNew );
+    Aig_ManSetRegNum( pAigNew, Aig_ManRegNum(pAig) );
+    return pAigNew;
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+