Index: trunk/psModules/src/imcombine/pmSubtractionIO.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionIO.c	(revision 19768)
+++ trunk/psModules/src/imcombine/pmSubtractionIO.c	(revision 19794)
@@ -122,8 +122,9 @@
         psMetadataAddS32(row, PS_LIST_TAIL, NAME_COLS,  0, "Number of columns", kernel->numCols);
         psMetadataAddS32(row, PS_LIST_TAIL, NAME_ROWS,  0, "Number of rows", kernel->numRows);
-        if (kernel->mode == PM_SUBTRACTION_MODE_1 || kernel->mode == PM_SUBTRACTION_MODE_DUAL) {
+        if (kernel->mode == PM_SUBTRACTION_MODE_1 || kernel->mode == PM_SUBTRACTION_MODE_2) {
             psMetadataAddVector(row, PS_LIST_TAIL, NAME_SOL1, 0, "Solution vector 1", kernel->solution1);
         }
-        if (kernel->mode == PM_SUBTRACTION_MODE_2 || kernel->mode == PM_SUBTRACTION_MODE_DUAL) {
+        if (kernel->mode == PM_SUBTRACTION_MODE_DUAL) {
+            psMetadataAddVector(row, PS_LIST_TAIL, NAME_SOL1, 0, "Solution vector 1", kernel->solution1);
             psMetadataAddVector(row, PS_LIST_TAIL, NAME_SOL2, 0, "Solution vector 2", kernel->solution2);
         }
@@ -139,6 +140,6 @@
     // CVS tags, used to identify the version of this file (in case incompatibilities are introduced)
     psString cvsFile = psStringCopy("$RCSfile: pmSubtractionIO.c,v $");
-    psString cvsRev  = psStringCopy("$Revision: 1.6 $");
-    psString cvsDate = psStringCopy("$Date: 2008-09-25 22:29:12 $");
+    psString cvsRev  = psStringCopy("$Revision: 1.7 $");
+    psString cvsDate = psStringCopy("$Date: 2008-10-01 19:55:09 $");
     psStringSubstitute(&cvsFile, NULL, "RCSfile: ");
     psStringSubstitute(&cvsRev,  NULL, "Revision: ");
@@ -306,5 +307,5 @@
 
         bool mdok;                      // Status of MD lookup
-        if (mode == PM_SUBTRACTION_MODE_1 || mode == PM_SUBTRACTION_MODE_DUAL) {
+        if (mode == PM_SUBTRACTION_MODE_1 || mode == PM_SUBTRACTION_MODE_2) {
             kernels->solution1 = psMemIncrRefCounter(psMetadataLookupPtr(&mdok, row, NAME_SOL1));
             if (!mdok) {
@@ -316,5 +317,13 @@
             }
         }
-        if (mode == PM_SUBTRACTION_MODE_2 || mode == PM_SUBTRACTION_MODE_DUAL) {
+        if (mode == PM_SUBTRACTION_MODE_DUAL) {
+            kernels->solution1 = psMemIncrRefCounter(psMetadataLookupPtr(&mdok, row, NAME_SOL1));
+            if (!mdok) {
+                psError(PS_ERR_UNKNOWN, false, "Unable to find column %s in subtraction kernel table.",
+                        NAME_SOL1);
+                psFree(kernels);
+                psFree(table);
+                return false;
+            }
             kernels->solution2 = psMemIncrRefCounter(psMetadataLookupPtr(&mdok, row, NAME_SOL2));
             if (!mdok) {