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diff --git a/src/interp/serror.boot b/src/interp/serror.boot
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+++ b/src/interp/serror.boot
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+-- Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
+-- All rights reserved.
+-- Copyright (C) 2007, Gabriel Dos Reis.
+-- All rights reserved.
+--
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions are
+-- met:
+--
+--     - Redistributions of source code must retain the above copyright
+--       notice, this list of conditions and the following disclaimer.
+--
+--     - Redistributions in binary form must reproduce the above copyright
+--       notice, this list of conditions and the following disclaimer in
+--       the documentation and/or other materials provided with the
+--       distribution.
+--
+--     - Neither the name of The Numerical ALgorithms Group Ltd. nor the
+--       names of its contributors may be used to endorse or promote products
+--       derived from this software without specific prior written permission.
+--
+-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+-- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+-- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+-- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import '"posit"
+
+--% Functions to handle specific errors (mostly syntax)
+ 
+)package "BOOT"
+
+syGeneralErrorHere() ==
+   sySpecificErrorHere('S2CY0002, [])
+ 
+sySpecificErrorHere(key, args) ==
+   sySpecificErrorAtToken($stok, key, args)
+ 
+sySpecificErrorAtToken(tok, key, args) ==
+   pos := tokPosn tok
+   ncSoftError(pos, key, args)
+ 
+syIgnoredFromTo(pos1, pos2) ==
+  if pfGlobalLinePosn pos1 = pfGlobalLinePosn pos2 then
+      ncSoftError(FromTo(pos1,pos2), 'S2CY0005, [])
+  else
+      ncSoftError(From pos1, 'S2CY0003, [])
+      ncSoftError(To   pos2, 'S2CY0004, [])
+ 
+npTrapForm(x)==
+   a:=pfSourceStok x
+   EQ(a,'NoToken)=>
+         syGeneralErrorHere()
+         THROW("TRAPPOINT","TRAPPED")
+   ncSoftError(tokPosn a, 'S2CY0002, [])
+   THROW("TRAPPOINT","TRAPPED")
+ 
+npTrap()==
+   ncSoftError(tokPosn $stok,'S2CY0002,[])
+   THROW("TRAPPOINT","TRAPPED")
+