Index: trunk/ppSim/src/ppSimSequenceObject.c
===================================================================
--- trunk/ppSim/src/ppSimSequenceObject.c	(revision 16500)
+++ trunk/ppSim/src/ppSimSequenceObject.c	(revision 19080)
@@ -1,5 +1,5 @@
 # include "ppSimSequence.h"
 
-bool ppSimSequenceObject (FILE *simfile, FILE *inject, psMetadata *sequence, int nSeq, psRandom *rng, const char *path, const char *basename, const char *injectCommand) {
+bool ppSimSequenceObject (FILE *simfile, FILE *inject, psMetadata *sequence, int nSeq, psRandom *rng, const char *path, const char *basename, char *camera, const char *injectCommand) {
 
     bool status;
@@ -9,5 +9,7 @@
     //       -skyrate $sky -ra $ra -dec $dec -pa $pa -scale $scale -zp $zp -seeing $seeing $filename",
 
-    char *camera = psMetadataLookupStr (&status, sequence, "CAMERA");
+    if (camera == NULL) {
+	camera = psMetadataLookupStr (&status, sequence, "CAMERA");
+    }
 
     // sequence reference coordinate