Index: trunk/Ohana/src/opihi/pcontrol/PclientCommand.c
===================================================================
--- trunk/Ohana/src/opihi/pcontrol/PclientCommand.c	(revision 8546)
+++ trunk/Ohana/src/opihi/pcontrol/PclientCommand.c	(revision 10652)
@@ -8,4 +8,9 @@
   char *line;
   struct timespec request, remain;
+
+  ASSERT (host != NULL, "host missing");
+  ASSERT (buffer != NULL, "buffer missing");
+  ASSERT (command != NULL, "command missing");
+  ASSERT (response != NULL, "response missing");
 
   /* avoid blocking on read, test every 100 usec, up to 50 msec */