Index: trunk/psModules/src/objects/pmSourceIO.c
===================================================================
--- trunk/psModules/src/objects/pmSourceIO.c	(revision 13191)
+++ trunk/psModules/src/objects/pmSourceIO.c	(revision 13192)
@@ -3,6 +3,6 @@
  *  @author EAM, IfA
  *
- *  @version $Revision: 1.38 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2007-05-03 00:12:03 $
+ *  @version $Revision: 1.39 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2007-05-03 20:04:31 $
  *
  *  Copyright 2004 Maui High Performance Computing Center, University of Hawaii
@@ -662,3 +662,81 @@
 }
 
-
+bool pmFPAviewCheckDataStatusForSources (const pmFPAview *view, const pmFPAfile *file)
+{
+    pmFPA *fpa = file->fpa;
+
+    if (view->chip == -1) {
+	bool exists = pmFPACheckDataStatusForSources (fpa);
+        return exists;
+    }
+    if (view->chip >= fpa->chips->n) {
+	psError(PS_ERR_IO, true, "Requested chip == %d >= fpa->chips->n == %ld", view->chip, fpa->chips->n);
+        return false;
+    }
+    pmChip *chip = fpa->chips->data[view->chip];
+
+    if (view->cell == -1) {
+        bool exists = pmChipCheckDataStatusForSources (chip);
+        return exists;
+    }
+    if (view->cell >= chip->cells->n) {
+	psError(PS_ERR_IO, true, "Requested cell == %d >= chip->cells->n == %ld", view->cell, chip->cells->n);
+        return false;
+    }
+    pmCell *cell = chip->cells->data[view->cell];
+
+    if (view->readout == -1) {
+        bool exists = pmCellCheckDataStatusForSources (cell);
+        return exists;
+    }
+
+    if (view->readout >= cell->readouts->n) {
+	psError(PS_ERR_IO, true, "Requested readout == %d >= cell->readouds->n == %ld", view->readout, cell->readouts->n);
+        return false;
+    }
+    pmReadout *readout = cell->readouts->data[view->readout];
+
+    bool exists = pmReadoutCheckDataStatusForSources (readout);
+    return exists;
+}
+
+bool pmFPACheckDataStatusForSources (const pmFPA *fpa) {
+
+    for (int i = 0; i < fpa->chips->n; i++) {
+	pmChip *chip = fpa->chips->data[i];
+	if (!chip) continue;
+	if (pmChipCheckDataStatusForSources (chip)) return true;
+    }
+    return false;
+}
+
+bool pmChipCheckDataStatusForSources (const pmChip *chip) {
+
+    for (int i = 0; i < chip->cells->n; i++) {
+	pmCell *cell = chip->cells->data[i];
+	if (!cell) continue;
+	if (pmCellCheckDataStatusForSources (cell)) return true;
+    }
+    return false;
+}
+
+bool pmCellCheckDataStatusForSources (const pmCell *cell) {
+
+    for (int i = 0; i < cell->readouts->n; i++) {
+	pmReadout *readout = cell->readouts->data[i];
+	if (!readout) continue;
+	if (pmReadoutCheckDataStatusForSources (readout)) return true;
+    }
+    return false;
+}
+
+bool pmReadoutCheckDataStatusForSources (const pmReadout *readout) {
+
+    bool status;
+
+    // select the psf of interest
+    pmPSF *psf = psMetadataLookupPtr (&status, readout->analysis, "PSPHOT.SOURCES");
+    if (!psf) return false;
+    return true;
+}
+
Index: trunk/psModules/src/objects/pmSourceIO.h
===================================================================
--- trunk/psModules/src/objects/pmSourceIO.h	(revision 13191)
+++ trunk/psModules/src/objects/pmSourceIO.h	(revision 13192)
@@ -4,6 +4,6 @@
  * @author EAM, IfA; GLG, MHPCC
  *
- * @version $Revision: 1.9 $ $Name: not supported by cvs2svn $
- * @date $Date: 2007-05-03 00:13:03 $
+ * @version $Revision: 1.10 $ $Name: not supported by cvs2svn $
+ * @date $Date: 2007-05-03 20:04:31 $
  * Copyright 2004 Maui High Performance Computing Center, University of Hawaii
  *
@@ -50,4 +50,10 @@
 bool pmReadoutWriteObjects (pmReadout *readout, const pmFPAview *view, pmFPAfile *file, const pmConfig *config);
 
+bool pmFPAviewCheckDataStatusForSources (const pmFPAview *view, const pmFPAfile *file);
+bool pmFPACheckDataStatusForSources (const pmFPA *fpa);
+bool pmChipCheckDataStatusForSources (const pmChip *chip);
+bool pmCellCheckDataStatusForSources (const pmCell *cell);
+bool pmReadoutCheckDataStatusForSources (const pmReadout *readout);
+
 /// @}
 # endif /* PM_SOURCE_IO_H */