Index: trunk/ppImage/src/ppImageDetrendBias.c
===================================================================
--- trunk/ppImage/src/ppImageDetrendBias.c	(revision 9825)
+++ trunk/ppImage/src/ppImageDetrendBias.c	(revision 10211)
@@ -8,13 +8,13 @@
 {
     psTrace("ppImage", 1, "Commencing bias processing....\n");
-//    psMetadataPrint(inputReadout->parent->concepts, 7);
 
     if (!pmSubtractBias(inputReadout, options->overscan, bias, dark)) {
-	return false;
+        psError(PS_ERR_UNKNOWN, false, "Unable to subtract bias.\n");
+        return false;
     }
 
     // Output overscan fit results, if required
     if (! options->doOverscan || ! options->overscan) {
-        return true;
+        return true;                    // No overscan fit to report
     }
 
@@ -33,5 +33,5 @@
                 psStringAppend(&coeffs, "%e ", poly->coeff[i]);
             }
-            psLogMsg("phase2", PS_LOG_INFO, "Overscan polynomial coefficients:\n%s\n", coeffs);
+            psLogMsg("ppImage", PS_LOG_INFO, "Overscan polynomial coefficients:\n%s\n", coeffs);
             psFree(coeffs);
             break;
@@ -49,5 +49,5 @@
                 psStringAppend(&coeffs, "\n");
             }
-            psLogMsg("phase2", PS_LOG_INFO, "Overscan spline coefficients:\n%s\n", coeffs);
+            psLogMsg("ppImage", PS_LOG_INFO, "Overscan spline coefficients:\n%s\n", coeffs);
             psFree(coeffs);
             break;