Index: trunk/ippTools/src/difftool.c
===================================================================
--- trunk/ippTools/src/difftool.c	(revision 11986)
+++ trunk/ippTools/src/difftool.c	(revision 11994)
@@ -520,4 +520,8 @@
     }
 
+    if (!psDBTransaction(config->dbh)) {
+        psError(PS_ERR_UNKNOWN, false, "database error");
+        return false;
+    }
 
     if (!p5DiffSkyfileInsert(config->dbh, 
@@ -527,4 +531,21 @@
             bg_mean_stdev
         )) {
+        if (!psDBRollback(config->dbh)) {
+            psError(PS_ERR_UNKNOWN, false, "database error");
+        }
+        psError(PS_ERR_UNKNOWN, false, "database error");
+        return false;
+    }
+
+    if (!setp5RunState(config, p5_id, "stop")) {
+        if (!psDBRollback(config->dbh)) {
+            psError(PS_ERR_UNKNOWN, false, "database error");
+        }
+        psError(PS_ERR_UNKNOWN, false, "database error");
+        return false;
+    }
+
+    // point of no return
+    if (!psDBCommit(config->dbh)) {
         psError(PS_ERR_UNKNOWN, false, "database error");
         return false;