Index: trunk/ppImage/src/ppImageParseCamera.c
===================================================================
--- trunk/ppImage/src/ppImageParseCamera.c	(revision 26895)
+++ trunk/ppImage/src/ppImageParseCamera.c	(revision 29833)
@@ -73,4 +73,13 @@
             return NULL;
         }
+    }
+
+    if (options->doNonLin) {
+      if (!ppImageDefineFile(config, input->fpa, "PPIMAGE.LINEARITY", "LINEARITY",
+			     PM_FPA_FILE_LINEARITY, PM_DETREND_TYPE_LINEARITY)) {
+	psError(PS_ERR_IO, false, "Can't find a non-linearity correction source");
+	psFree(options);
+	return NULL;
+      }
     }