Index: trunk/Ohana/src/opihi/cmd.data/extract.c
===================================================================
--- trunk/Ohana/src/opihi/cmd.data/extract.c	(revision 7917)
+++ trunk/Ohana/src/opihi/cmd.data/extract.c	(revision 26884)
@@ -60,4 +60,5 @@
     out[0].bscale = in[0].bscale;
     out[0].bzero  = in[0].bzero;
+    strcpy (out[0].file, in[0].file);
     gfits_copy_header (&in[0].header, &out[0].header);
     gfits_modify (&out[0].header, "NAXIS1", "%d", 1, Nx);