diff --git a/Operation.cpp b/Operation.cpp
index a60e7af..7b367de 100644
--- a/Operation.cpp
+++ b/Operation.cpp
@@ -5987,7 +5987,7 @@ Operation::SpecialLink( const DBLVECTOR& vAxStart, const DBLVECTOR& vAxEnd, int
    string sHeadName = GetHeadName() ;
    int nExitNbr = GetExitNbr() ;
    string sTcPos = GetToolTcPos() ;
-   if ( ( pPrevOpe != nullptr  &&  ! bPrevMain)  ||  ( pNextOpe != nullptr  &&  ! bNextMain)) {
+   if ( ( pPrevOpe != nullptr  &&  pNextOpe == nullptr  &&  ! bPrevMain)  ||  ( pNextOpe != nullptr  &&  ! bNextMain)) {
       if ( ! GetDoubleToolData( sToolName, sTcPos, sHeadName, nExitNbr))
          return false ;
    }