diff --git a/tconfpy.py b/tconfpy.py
index e94d9ba..43a6cf9 100755
--- a/tconfpy.py
+++ b/tconfpy.py
@@ -6,7 +6,7 @@
 # Program Information
 
 PROGNAME = "tconfpy"
-RCSID = "$Id: tconfpy.py,v 1.161 2004/04/06 19:50:17 tundra Exp $"
+RCSID = "$Id: tconfpy.py,v 1.162 2004/04/07 00:10:37 tundra Exp $"
 VERSION = RCSID.split()[2]
 
 # Copyright Information
@@ -138,6 +138,7 @@
 #----------------------------------------------------------#
 
 
+ALLOWNEW      = True     # Allow new variable creation in cfg file
 DEBUG         = False    # Control Debug output
 LITERALVARS   = False
 INLITERAL     = False    # Indicates we are currently in a literal block
@@ -302,6 +303,7 @@
 Messages["eVALSMALL"]    = FILENUM + "%s Is Smaller Than The Minimum Allowed, %s, For Variable '%s'"
 Messages["eVARRESERVED"] = FILENUM + "Variable Name Cannot Begin With The '%s' Symbol"
 Messages["eVARNAMESPC"]  = FILENUM + "Variable Names May Not Contain Whitespace"
+Messages["eVARNEW"]      = FILENUM + "New Variable Creation Not Permitted"
 Messages["eVARNONAME"]   = FILENUM + "Variable Name Evaluates To Null String.  Not Permitted"
 Messages["eVARREADONLY"] = FILENUM + "Variable '%s' Is Read-Only.  Cannot Change Its Value"
 Messages["eVARUNDEF"]    = FILENUM + "Attempt To Reference Undefined Variable '%s'"
@@ -397,13 +399,14 @@
 #                  Public API To Module                    #
 #----------------------------------------------------------#
 
-def ParseConfig(cfgfile, InitialSymTbl={}, Debug=False, LiteralVars=False):
+def ParseConfig(cfgfile, InitialSymTbl={}, AllowNewVars=True, Debug=False, LiteralVars=False):
 
     global DebugMsgs, ErrMsgs, WarnMsgs, LiteralLines
-    global CondStack, DEBUG, SymTable, TotalLines, LITERALVARS, INLITERAL
+    global CondStack, ALLOWNEW, DEBUG, SymTable, TotalLines, LITERALVARS, INLITERAL
     
     # Initialize the globals
 
+    ALLOWNEW      = AllowNewVars
     DEBUG         = Debug
     LITERALVARS   = LiteralVars
     
@@ -1073,9 +1076,16 @@
                 # create the new entry
 
                 if l not in SymTable:
-                    d.Default = r
-                    d.Value = r
-                    SymTable[l] = d
+
+                    # Only do this if new variable creation allowed
+                    if ALLOWNEW:
+                        d.Default = r
+                        d.Value = r
+                        SymTable[l] = d
+
+                    # New vars not allowed
+                    else:
+                        ErrorMsg("eVARNEW", (cfgfile, linenum))
 
                 # Otherwise, update an existing entry.
                 # For existing entries we have to first