diff --git a/site_ansto/instrument/util/gen_sct.py b/site_ansto/instrument/util/gen_sct.py
index a089b30a..8871aaab 100755
--- a/site_ansto/instrument/util/gen_sct.py
+++ b/site_ansto/instrument/util/gen_sct.py
@@ -64,6 +64,12 @@ Verbose = False
 DriverDump = False
 CodeDump = False
 
+def PrintParseError(message):
+    print message
+
+def PrintPostError(message):
+    print message
+
 #
 # Tokenizer: This recognizes the tokens which can be keywords, identifiers,
 # numbers or strings plus the punctuation.
@@ -212,7 +218,8 @@ def t_tcl_newline(t):
     t.lexer.lineno += t.value.count("\n")
 
 def t_tcl_error(t):
-    print("Illegal tcl character '%s'" % t.value[0])
+    message = "Illegal tcl character '%s'" % t.value[0]
+    PrintParseError(message)
     t.lexer.skip(1)
 
 def t_TEXT_STRING1(t):
@@ -240,7 +247,8 @@ def t_FLOATER(t):
     try:
         t.value = float(t.value)
     except ValueError:
-        print "Floating value invalid:", t.value
+        message = "Floating value invalid: " + repr(t.value)
+        PrintParseError(message)
         t.value = 0.0
     return t
 
@@ -249,7 +257,8 @@ def t_INTEGER(t):
     try:
         t.value = int(t.value)
     except ValueError:
-        print "Integer value too large:", t.value
+        message = "Integer value too large: " + repr(t.value)
+        PrintParseError(message)
         t.value = 0
     return t
 
@@ -270,7 +279,9 @@ def t_newline(t):
     t.lexer.lineno += t.value.count("\n")
 
 def t_error(t):
-    print("Illegal character '%s'" % t.value[0])
+    message = "Illegal character '%s' at line %d" % \
+          (t.value[0], t.lexer.lineno)
+    PrintParseError(message)
     t.lexer.skip(1)
 
 #
@@ -593,7 +604,10 @@ def p_empty(p):
     pass
 
 def p_error(t):
-    print("Syntax error at '%s'" % t.value), t
+    message = "Syntax error at line %d" % lexer.lineno
+    message += " " + repr(t)
+    message += " " + repr(t.value)
+    PrintParseError(message)
 
 #
 # Utility functions
@@ -717,7 +731,8 @@ def build_variable(MyDriver, p):
                     MyDriver['Funcs'][MyVar[func]]['type'] = func
                 else:
                     # TODO FIXME error message
-                    print 'Error: Function type mismatch: var = ' + str(MyVar) + ', code = ' + str(MyDriver['Funcs'][MyVar[func]]) + ', func = ' + str(func)
+                    message = 'Error: Function type mismatch: var = ' + str(MyVar) + ', code = ' + str(MyDriver['Funcs'][MyVar[func]]) + ', func = ' + str(func)
+                    PrintPostError(message)
             MyDriver['Funcs'][MyVar[func]]['reference_count'] += 1
     if 'permlink' in MyVar:
         device_type, node_type = MyVar['permlink'].split('.')
@@ -842,7 +857,9 @@ def build_driver(MyDriver, TheTree):
                 MyDriver[key] = item[key]
     for item in MyDriver['Permlink']:
         if len(MyDriver['Permlink'][item]) > 1:
-            print 'Error: duplicate permlink entries for "%s"' % item, MyDriver['Permlink'][item]
+            message = 'Error: duplicate permlink entries for "%s"' % item
+            message += " " + repr(MyDriver['Permlink'][item])
+            PrintPostError(message)
     if Verbose:
         print "MyDriver:", MyDriver
 #
@@ -1348,7 +1365,8 @@ def put_group(MyDriver, MyGroup):
                     idx = int(device_type[1:])
                     device_type = '[string index ${permlink} %d]' % idx
                 else:
-                    print 'Error: permlink required in make_ags'
+                    message = 'Error: permlink required in make_ags'
+                    PrintPostError(message)
             if 'make_args' in MyDriver and 'id' in MyDriver['make_args'].split():
                 permlink = device_type + '[format "%02d" ${id}]' + node_type
             else: