--- a/targets/Win32/plc_Win32_main.c	Tue Dec 15 16:04:28 2009 +0100
+++ b/targets/Win32/plc_Win32_main.c	Tue Dec 15 18:24:50 2009 +0100
@@ -227,6 +227,11 @@
 	WaitForSingleObject(python_sem, INFINITE);
 }
 
+int CheckRetainBuffer(void)
+{
+	return 1;
+}
+
 void Retain(unsigned int offset, unsigned int count, void * p)
 {
     unsigned int position;