--- a/targets/Linux/plc_Linux_main.c	Tue Dec 15 18:24:50 2009 +0100
+++ b/targets/Linux/plc_Linux_main.c	Tue Dec 15 20:51:51 2009 +0100
@@ -199,6 +199,11 @@
     pthread_mutex_lock(&python_mutex);
 }
 
+int CheckRetainBuffer(void)
+{
+	return 1;
+}
+
 void Retain(unsigned int offset, unsigned int count, void *p)
 {
 }