Index: trunk/ppStack/src/ppStackCamera.c
===================================================================
--- trunk/ppStack/src/ppStackCamera.c	(revision 13464)
+++ trunk/ppStack/src/ppStackCamera.c	(revision 13489)
@@ -104,5 +104,11 @@
 
     // Output image
-    pmFPAfile *output = pmFPAfileDefineOutput(config, NULL, "PPSTACK.OUTPUT");
+    pmFPA *fpa = pmFPAConstruct(config->camera); // FPA to contain the output
+    if (!fpa) {
+        psError(PS_ERR_UNEXPECTED_NULL, false, "Unable to construct an FPA from camera configuration.");
+        return false;
+    }
+    pmFPAfile *output = pmFPAfileDefineOutput(config, fpa, "PPSTACK.OUTPUT");
+    psFree(fpa);                        // Drop reference
     if (!output) {
         psError(PS_ERR_IO, false, _("Unable to generate output file from PPSTACK.OUTPUT"));
@@ -113,4 +119,41 @@
         return false;
     }
+
+    // Generate the correct structure
+    pmFPALevel phuLevel = pmFPAPHULevel(output->format); // Level at which PHU goes
+    pmFPAview *view = pmFPAviewAlloc(0);// View for current level
+    if (phuLevel == PM_FPA_LEVEL_FPA) {
+        if (!pmFPAAddSourceFromView(fpa, "Stack", view, output->format)) {
+            psError(PS_ERR_UNKNOWN, false, "Unable to add PHU to FPA.");
+            psFree(fpa);
+            psFree(view);
+            return NULL;
+        }
+    } else {
+        pmChip *chip;                       // Chip from FPA
+        while ((chip = pmFPAviewNextChip(view, fpa, 1))) {
+            if (phuLevel == PM_FPA_LEVEL_CHIP) {
+                if (!pmFPAAddSourceFromView(fpa, "Stack", view, output->format)) {
+                    psError(PS_ERR_UNKNOWN, false, "Unable to add PHU to FPA.");
+                    psFree(fpa);
+                    psFree(view);
+                    return NULL;
+                }
+            } else {
+                pmCell *cell;                   // Cell from chip
+                while ((cell = pmFPAviewNextCell(view, fpa, 1))) {
+                    if (phuLevel == PM_FPA_LEVEL_CELL) {
+                        if (!pmFPAAddSourceFromView(fpa, "Stack", view, output->format)) {
+                            psError(PS_ERR_UNKNOWN, false, "Unable to add PHU to FPA.");
+                            psFree(fpa);
+                            psFree(view);
+                            return NULL;
+                        }
+                    }
+                }
+            }
+        }
+    }
+    psFree(view);
 
     // Output mask