Index: tol/btol/set_type/set.cpp
===================================================================
--- tol/btol/set_type/set.cpp	(revision 87e8200e83957a6d006f51103eeeaf84b9230acd)
+++ tol/btol/set_type/set.cpp	(revision 61c1ac27a133f5cc5f18f97921dd061b89cd6e8d)
@@ -768,4 +768,6 @@
 {
   BSet res  = (*this);
+//res.PutStruct(NULL);
+  res.struct_ = NULL;
   for(BInt n=1; n<=set.Card(); n++)
   {