Index: trunk/pswarp/src/pswarpTransformReadout_Opt.c
===================================================================
--- trunk/pswarp/src/pswarpTransformReadout_Opt.c	(revision 14874)
+++ trunk/pswarp/src/pswarpTransformReadout_Opt.c	(revision 14902)
@@ -233,4 +233,6 @@
 
     output->data_exists = true;
+    output->parent->data_exists = true;
+    output->parent->parent->data_exists = true;
 
     psLogMsg ("pswarp", 3, "warping analysis: %f sec\n", psTimerMark ("warp"));