Index: trunk/Ohana/src/opihi/dvo/avperiodogram.c
===================================================================
--- trunk/Ohana/src/opihi/dvo/avperiodogram.c	(revision 40408)
+++ trunk/Ohana/src/opihi/dvo/avperiodogram.c	(revision 40574)
@@ -51,4 +51,12 @@
   // the result files are left behind for the user to access (no automatic re-merge)
   if (PARALLEL && !HOST_ID) {
+
+    // check for -region and apply to current sky region
+    if (!SetSkyRegions (selection)) {
+      FreeSkyRegionSelection (selection);
+      dbFreeFields (fields, Nfields);
+      goto help;
+    }
+
     int status = HostTableParallelOps (skylist, argc, argv, NULL, FALSE, 0, VERBOSE);
     SkyListFree (skylist);