Index: trunk/psModules/src/astrom/pmFPACopy.c
===================================================================
--- trunk/psModules/src/astrom/pmFPACopy.c	(revision 6872)
+++ trunk/psModules/src/astrom/pmFPACopy.c	(revision 6888)
@@ -320,4 +320,5 @@
 
     hdu->images = psArrayAlloc(numReadouts);
+    hdu->images->n = numReadouts;
     for (int i = 0; i < numReadouts; i++) {
         psImage *image = psImageAlloc(xSize, ySize, PS_TYPE_F32);