diff --git a/pym/cl_template.py b/pym/cl_template.py
index ad9f412..25b1778 100644
--- a/pym/cl_template.py
+++ b/pym/cl_template.py
@@ -411,7 +411,13 @@ class fileHeader(_terms):
 
                     self.comment = self._getComment()
                 self.fileType = self._getType()
-                self.typeAppend = self._getAppend()
+                typeAppend = self._getAppend()
+                if typeAppend:
+                    self.typeAppend = typeAppend
+                else:
+                    self.headerTerm = False
+                    self.setError(_("incorrect header parameters - '%s'")\
+                    %"append=%s"%self.params["append"]
         if not incorrectParams and self.params:
             incorrectParams = set(self.params.keys()) - set(self.allowParam)
         if incorrectParams:
@@ -428,9 +434,11 @@ class fileHeader(_terms):
 
     def _getAppend(self):
         """Выдать тип добавления файла"""
-        if self.params.has_key("append") and self.params["append"] in\
-            self._fileAppend:
-            return self.params["append"]
+        if self.params.has_key("append"):
+            if self.params["append"] in self._fileAppend:
+                return self.params["append"]
+            else:
+                return False
         else:
             if self.fileType != "raw" and self.fileType != "bin" and\
                 self.fileType != "":