diff --git a/emit.cc b/emit.cc
index 8d5e9aed4..f9eaf36c8 100644
--- a/emit.cc
+++ b/emit.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: emit.cc,v 1.63 2001/10/19 21:53:24 steve Exp $"
+#ident "$Id: emit.cc,v 1.64 2002/01/19 19:02:08 steve Exp $"
 #endif
 
 # include "config.h"
@@ -186,8 +186,7 @@ bool NetCAssign::emit_proc(struct target_t*tgt) const
 
 bool NetCondit::emit_proc(struct target_t*tgt) const
 {
-      tgt->proc_condit(this);
-      return true;
+      return tgt->proc_condit(this);
 }
 
 bool NetDeassign::emit_proc(struct target_t*tgt) const
@@ -263,16 +262,20 @@ void NetBlock::emit_recurse(struct target_t*tgt) const
       } while (cur != last_);
 }
 
-void NetCondit::emit_recurse_if(struct target_t*tgt) const
+bool NetCondit::emit_recurse_if(struct target_t*tgt) const
 {
       if (if_)
-	    if_->emit_proc(tgt);
+	    return if_->emit_proc(tgt);
+      else
+	    return true;
 }
 
-void NetCondit::emit_recurse_else(struct target_t*tgt) const
+bool NetCondit::emit_recurse_else(struct target_t*tgt) const
 {
       if (else_)
-	    else_->emit_proc(tgt);
+	    return else_->emit_proc(tgt);
+      else
+	    return true;
 }
 
 bool NetEvProbe::emit_node(struct target_t*tgt) const
@@ -474,6 +477,9 @@ bool emit(const Design*des, const char*type)
 
 /*
  * $Log: emit.cc,v $
+ * Revision 1.64  2002/01/19 19:02:08  steve
+ *  Pass back target errors processing conditionals.
+ *
  * Revision 1.63  2001/10/19 21:53:24  steve
  *  Support multiple root modules (Philip Blundell)
  *
diff --git a/net_force.cc b/net_force.cc
index d80acce1f..3d30e2eb3 100644
--- a/net_force.cc
+++ b/net_force.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: net_force.cc,v 1.6 2001/11/14 03:28:49 steve Exp $"
+#ident "$Id: net_force.cc,v 1.7 2002/01/19 19:02:08 steve Exp $"
 #endif
 
 # include "config.h"
@@ -89,6 +89,8 @@ const NetNet*NetDeassign::lval() const
 NetForce::NetForce(NetScope*s, const string&n, NetNet*l)
 : NetNode(s, n, l->pin_count()), lval_(l)
 {
+      lval_->incr_eref();
+
       for (unsigned idx = 0 ;  idx < pin_count() ;  idx += 1) {
 	    pin(idx).set_dir(Link::INPUT);
 	    pin(idx).set_name("I", idx);
@@ -97,6 +99,7 @@ NetForce::NetForce(NetScope*s, const string&n, NetNet*l)
 
 NetForce::~NetForce()
 {
+      lval_->decr_eref();
 }
 
 const Link& NetForce::lval_pin(unsigned idx) const
@@ -127,6 +130,9 @@ const NetNet*NetRelease::lval() const
 
 /*
  * $Log: net_force.cc,v $
+ * Revision 1.7  2002/01/19 19:02:08  steve
+ *  Pass back target errors processing conditionals.
+ *
  * Revision 1.6  2001/11/14 03:28:49  steve
  *  DLL target support for force and release.
  *
diff --git a/netlist.h b/netlist.h
index bbd11719f..1addf73de 100644
--- a/netlist.h
+++ b/netlist.h
@@ -19,7 +19,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: netlist.h,v 1.228 2001/12/31 00:08:14 steve Exp $"
+#ident "$Id: netlist.h,v 1.229 2002/01/19 19:02:08 steve Exp $"
 #endif
 
 /*
@@ -1455,8 +1455,8 @@ class NetCondit  : public NetProc {
 	// Replace the condition expression.
       void set_expr(NetExpr*ex);
 
-      void emit_recurse_if(struct target_t*) const;
-      void emit_recurse_else(struct target_t*) const;
+      bool emit_recurse_if(struct target_t*) const;
+      bool emit_recurse_else(struct target_t*) const;
 
       virtual bool emit_proc(struct target_t*) const;
       virtual int match_proc(struct proc_match_t*);
@@ -2864,6 +2864,9 @@ extern ostream& operator << (ostream&, NetNet::Type);
 
 /*
  * $Log: netlist.h,v $
+ * Revision 1.229  2002/01/19 19:02:08  steve
+ *  Pass back target errors processing conditionals.
+ *
  * Revision 1.228  2001/12/31 00:08:14  steve
  *  Support $signed cast of expressions.
  *
diff --git a/t-dll-proc.cc b/t-dll-proc.cc
index 97b44adaa..53d5bf37a 100644
--- a/t-dll-proc.cc
+++ b/t-dll-proc.cc
@@ -18,7 +18,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: t-dll-proc.cc,v 1.40 2001/11/14 03:28:49 steve Exp $"
+#ident "$Id: t-dll-proc.cc,v 1.41 2002/01/19 19:02:08 steve Exp $"
 #endif
 
 # include "config.h"
@@ -421,7 +421,7 @@ bool dll_target::proc_cassign(const NetCAssign*net)
       return true;
 }
 
-void dll_target::proc_condit(const NetCondit*net)
+bool dll_target::proc_condit(const NetCondit*net)
 {
       assert(stmt_cur_);
       assert(stmt_cur_->type_ == IVL_ST_NONE);
@@ -438,12 +438,13 @@ void dll_target::proc_condit(const NetCondit*net)
       ivl_statement_t save_cur_ = stmt_cur_;
 
       stmt_cur_ = save_cur_->u_.condit_.stmt_+0;
-      net->emit_recurse_if(this);
+      bool flag = net->emit_recurse_if(this);
 
       stmt_cur_ = save_cur_->u_.condit_.stmt_+1;
-      net->emit_recurse_else(this);
+      flag = flag && net->emit_recurse_else(this);
 
       stmt_cur_ = save_cur_;
+      return flag;
 }
 
 bool dll_target::proc_deassign(const NetDeassign*net)
@@ -531,8 +532,16 @@ bool dll_target::proc_force(const NetForce*net)
 	    calloc(1, sizeof(struct ivl_lval_s));
 
       const NetNet*lsig = net->lval();
+      assert(lsig);
       ivl_signal_t sig = find_signal(des_, lsig);
       assert(sig);
+      if (sig->type_ != IVL_SIT_REG) {
+	    cerr << net->get_line() << ": internal error: Sorry, "
+		 << "force to nets not supported by this target."
+		 << endl;
+	    return false;
+      }
+
       assert(sig->type_ == IVL_SIT_REG);
 
       stmt_cur_->u_.cassign_.lval[0].width_ = lsig->pin_count();
@@ -784,6 +793,9 @@ void dll_target::proc_while(const NetWhile*net)
 
 /*
  * $Log: t-dll-proc.cc,v $
+ * Revision 1.41  2002/01/19 19:02:08  steve
+ *  Pass back target errors processing conditionals.
+ *
  * Revision 1.40  2001/11/14 03:28:49  steve
  *  DLL target support for force and release.
  *
diff --git a/t-dll.cc b/t-dll.cc
index 8649c7187..806c88a43 100644
--- a/t-dll.cc
+++ b/t-dll.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: t-dll.cc,v 1.77 2002/01/12 04:03:09 steve Exp $"
+#ident "$Id: t-dll.cc,v 1.78 2002/01/19 19:02:08 steve Exp $"
 #endif
 
 # include "config.h"
@@ -163,10 +163,13 @@ static ivl_scope_t find_scope_from_root(ivl_scope_t root, const NetScope*cur)
 
 ivl_scope_t dll_target::find_scope(ivl_design_s &des, const NetScope*cur)
 {
-      unsigned i;
-      ivl_scope_t scope = NULL;
-      for (i = 0; i < des.nroots_ && scope == NULL; i++)
+      assert(cur);
+
+      ivl_scope_t scope = 0;
+      for (unsigned i = 0; i < des.nroots_ && scope == 0; i += 1) {
+	    assert(des.roots_[i]);
 	    scope = find_scope_from_root(des.roots_[i], cur);
+      }
       return scope;
 }
 
@@ -1873,6 +1876,9 @@ extern const struct target tgt_dll = { "dll", &dll_target_obj };
 
 /*
  * $Log: t-dll.cc,v $
+ * Revision 1.78  2002/01/19 19:02:08  steve
+ *  Pass back target errors processing conditionals.
+ *
  * Revision 1.77  2002/01/12 04:03:09  steve
  *  Make BUFZ device strengths available.
  *
diff --git a/t-dll.h b/t-dll.h
index c8c614eca..7db91785c 100644
--- a/t-dll.h
+++ b/t-dll.h
@@ -19,7 +19,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: t-dll.h,v 1.73 2002/01/03 04:19:01 steve Exp $"
+#ident "$Id: t-dll.h,v 1.74 2002/01/19 19:02:08 steve Exp $"
 #endif
 
 # include  "target.h"
@@ -108,7 +108,7 @@ struct dll_target  : public target_t, public expr_scan_t {
       bool proc_block(const NetBlock*);
       void proc_case(const NetCase*);
       bool proc_cassign(const NetCAssign*);
-      void proc_condit(const NetCondit*);
+      bool proc_condit(const NetCondit*);
       bool proc_deassign(const NetDeassign*);
       bool proc_delay(const NetPDelay*);
       bool proc_disable(const NetDisable*);
@@ -590,6 +590,9 @@ struct ivl_statement_s {
 
 /*
  * $Log: t-dll.h,v $
+ * Revision 1.74  2002/01/19 19:02:08  steve
+ *  Pass back target errors processing conditionals.
+ *
  * Revision 1.73  2002/01/03 04:19:01  steve
  *  Add structural modulus support down to vvp.
  *
diff --git a/t-vvm.cc b/t-vvm.cc
index 9cd746bb8..7901210c5 100644
--- a/t-vvm.cc
+++ b/t-vvm.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: t-vvm.cc,v 1.213 2001/10/14 03:50:53 steve Exp $"
+#ident "$Id: t-vvm.cc,v 1.214 2002/01/19 19:02:08 steve Exp $"
 #endif
 
 # include "config.h"
@@ -190,7 +190,7 @@ class target_vvm : public target_t {
       virtual void proc_case(const NetCase*net);
               void proc_case_fun(ostream&os, const NetCase*net);
       virtual bool proc_cassign(const NetCAssign*);
-      virtual void proc_condit(const NetCondit*);
+      virtual bool proc_condit(const NetCondit*);
               void proc_condit_fun(ostream&os, const NetCondit*);
       virtual bool proc_deassign(const NetDeassign*);
       virtual bool proc_delay(const NetPDelay*);
@@ -3195,11 +3195,11 @@ bool target_vvm::proc_cassign(const NetCAssign*dev)
       return true;
 }
 
-void target_vvm::proc_condit(const NetCondit*net)
+bool target_vvm::proc_condit(const NetCondit*net)
 {
       if (function_def_flag_) {
 	    proc_condit_fun(out, net);
-	    return;
+	    return true;
       }
 
       string expr = emit_proc_rval(this, net->expr());
@@ -3250,6 +3250,7 @@ void target_vvm::proc_condit(const NetCondit*net)
 
       defn << "static bool " << thread_class_ << "_step_" << out_step <<
 	    "_(vvm_thread*thr) {" << endl;
+      return true;
 }
 
 void target_vvm::proc_condit_fun(ostream&os, const NetCondit*net)
@@ -3658,6 +3659,9 @@ extern const struct target tgt_vvm = {
 };
 /*
  * $Log: t-vvm.cc,v $
+ * Revision 1.214  2002/01/19 19:02:08  steve
+ *  Pass back target errors processing conditionals.
+ *
  * Revision 1.213  2001/10/14 03:50:53  steve
  *  vvm support for pullup/down gates (PR#288)
  *
diff --git a/target.cc b/target.cc
index bada0b721..17379fd08 100644
--- a/target.cc
+++ b/target.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: target.cc,v 1.57 2001/08/25 23:50:03 steve Exp $"
+#ident "$Id: target.cc,v 1.58 2002/01/19 19:02:08 steve Exp $"
 #endif
 
 # include "config.h"
@@ -216,11 +216,12 @@ bool target_t::proc_cassign(const NetCAssign*dev)
       return false;
 }
 
-void target_t::proc_condit(const NetCondit*condit)
+bool target_t::proc_condit(const NetCondit*condit)
 {
       cerr << "target (" << typeid(*this).name() <<  "): "
 	    "Unhandled conditional:" << endl;
       condit->dump(cerr, 6);
+      return false;
 }
 
 bool target_t::proc_deassign(const NetDeassign*dev)
@@ -383,6 +384,9 @@ void expr_scan_t::expr_binary(const NetEBinary*ex)
 
 /*
  * $Log: target.cc,v $
+ * Revision 1.58  2002/01/19 19:02:08  steve
+ *  Pass back target errors processing conditionals.
+ *
  * Revision 1.57  2001/08/25 23:50:03  steve
  *  Change the NetAssign_ class to refer to the signal
  *  instead of link into the netlist. This is faster
diff --git a/target.h b/target.h
index f1fe266bb..fbbfcc289 100644
--- a/target.h
+++ b/target.h
@@ -19,7 +19,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: target.h,v 1.54 2001/08/25 23:50:03 steve Exp $"
+#ident "$Id: target.h,v 1.55 2002/01/19 19:02:08 steve Exp $"
 #endif
 
 # include  "netlist.h"
@@ -105,7 +105,7 @@ struct target_t {
       virtual bool proc_block(const NetBlock*);
       virtual void proc_case(const NetCase*);
       virtual bool proc_cassign(const NetCAssign*);
-      virtual void proc_condit(const NetCondit*);
+      virtual bool proc_condit(const NetCondit*);
       virtual bool proc_deassign(const NetDeassign*);
       virtual bool proc_delay(const NetPDelay*);
       virtual bool proc_disable(const NetDisable*);
@@ -162,6 +162,9 @@ extern const struct target *target_table[];
 
 /*
  * $Log: target.h,v $
+ * Revision 1.55  2002/01/19 19:02:08  steve
+ *  Pass back target errors processing conditionals.
+ *
  * Revision 1.54  2001/08/25 23:50:03  steve
  *  Change the NetAssign_ class to refer to the signal
  *  instead of link into the netlist. This is faster