Index: trunk/psModules/src/objects/pmFootprintIDs.c
===================================================================
--- trunk/psModules/src/objects/pmFootprintIDs.c	(revision 29004)
+++ trunk/psModules/src/objects/pmFootprintIDs.c	(revision 31153)
@@ -66,5 +66,6 @@
 
    if (footprints->n == 0) {
-       psError(PS_ERR_BAD_PARAMETER_SIZE, true, "You didn't provide any footprints");
+       // XXX this was an error, but is an allowed condition -- NULL returned image means no footprints for any peaks
+       // psError(PS_ERR_BAD_PARAMETER_SIZE, true, "You didn't provide any footprints");
        return NULL;
    }