Index: /branches/eam_branch_20080511/ppSim/src/ppSimCreate.c
===================================================================
--- /branches/eam_branch_20080511/ppSim/src/ppSimCreate.c	(revision 17705)
+++ /branches/eam_branch_20080511/ppSim/src/ppSimCreate.c	(revision 17706)
@@ -102,4 +102,14 @@
 	    psFree(fpa);
 	    return NULL;
+	}
+
+	// *** Define two input files:
+	// PPSIM.REAL.SOURCES
+
+	// the input image(s) are required arguments; they define the camera
+	pmFPAfile *realSources = pmFPAfileDefineFromArgs (&status, config, "PPSIM.REAL.SOURCES", "REAL.SOURCES");
+	if (!status) {
+	  psError(PS_ERR_UNKNOWN, false, "Failed to build FPA from PPSIM.REAL.SOURCES");
+	  return false;
 	}