Index: trunk/ippTools/src/regtool.c
===================================================================
--- trunk/ippTools/src/regtool.c	(revision 14097)
+++ trunk/ippTools/src/regtool.c	(revision 14098)
@@ -31,4 +31,5 @@
 #include "chiptool.h"
 
+// imfile
 static bool pendingimfileMode(pxConfig *config);
 static bool addprocessedimfileMode(pxConfig *config);
@@ -36,8 +37,9 @@
 static bool revertprocessedimfileMode(pxConfig *config);
 static bool updateprocessedimfileMode(pxConfig *config);
-
+// exp
 static bool pendingexpMode(pxConfig *config);
 static bool addprocessedexpMode(pxConfig *config);
 static bool processedexpMode(pxConfig *config);
+static bool revertprocessedexpMode(pxConfig *config);
 static bool updateprocessedexpMode(pxConfig *config);
 
@@ -70,4 +72,5 @@
 
     switch (config->mode) {
+        // imfile
         MODECASE(REGTOOL_MODE_PENDINGIMFILE,         pendingimfileMode);
         MODECASE(REGTOOL_MODE_ADDPROCESSEDIMFILE,    addprocessedimfileMode);
@@ -75,7 +78,9 @@
         MODECASE(REGTOOL_MODE_REVERTPROCESSEDIMFILE, revertprocessedimfileMode);
         MODECASE(REGTOOL_MODE_UPDATEPROCESSEDIMFILE, updateprocessedimfileMode);
+        // exp
         MODECASE(REGTOOL_MODE_PENDINGEXP,            pendingexpMode);
         MODECASE(REGTOOL_MODE_ADDPROCESSEDEXP,       addprocessedexpMode);
         MODECASE(REGTOOL_MODE_PROCESSEDEXP,          processedexpMode);
+        MODECASE(REGTOOL_MODE_REVERTPROCESSEDEXP,    revertprocessedexpMode);
         MODECASE(REGTOOL_MODE_UPDATEPROCESSEDEXP,    updateprocessedexpMode);
         default:
@@ -816,4 +821,35 @@
 
     psFree(output);
+
+    return true;
+}
+
+static bool revertprocessedexpMode(pxConfig *config)
+{
+    PS_ASSERT_PTR_NON_NULL(config, false);
+
+    psString query = pxDataGet("regtool_revertprocessedexp.sql");
+    if (!query) {
+        psError(PXTOOLS_ERR_DATA, false, "failed to retreive SQL statement");
+        return false;
+    }
+
+    if (config->where) {
+        psString whereClause = psDBGenerateWhereConditionSQL(config->where, "rawExp");
+        psStringAppend(&query, " AND %s", whereClause);
+        psFree(whereClause);
+    }
+
+    if (!p_psDBRunQuery(config->dbh, query)) {
+        psError(PS_ERR_UNKNOWN, false, "database error");
+        psFree(query);
+        return false;
+    }
+    psFree(query);
+
+    if (psDBAffectedRows(config->dbh) < 1) {
+        psError(PS_ERR_UNKNOWN, false, "should have affected atleast 1 row");
+        return false;
+    }
 
     return true;