diff --git a/pyren/mod_db_manager.py b/pyren/mod_db_manager.py
index 73ef6be..bbfff64 100644
--- a/pyren/mod_db_manager.py
+++ b/pyren/mod_db_manager.py
@@ -75,7 +75,7 @@ def find_DBs():
             mod_globals.opt_ddt = True
 
     #check cache version
-    verfilename = "./cache/version09r_fix#1.txt"
+    verfilename = "./cache/version09r_fix#2.txt"
     if not os.path.isfile(verfilename):
         #if the cache has old version then we should clear it
         for root, dirs, files in os.walk("./cache"):
diff --git a/pyren/mod_ecu_identification.py b/pyren/mod_ecu_identification.py
index 522d0b0..4fe0918 100755
--- a/pyren/mod_ecu_identification.py
+++ b/pyren/mod_ecu_identification.py
@@ -88,13 +88,33 @@ class ecu_identification:
       for cmpt in Computation:
         self.type = cmpt.getAttribute("type")
         tmp = cmpt.getElementsByTagName("Value").item(0).firstChild.nodeValue
-        self.computation = tmp.replace(" ","").replace("&","&")
+        tmp = tmp.replace(" ","").replace("&","&")
+
+        questionMarkCount = tmp.count('?"')
+        if questionMarkCount:
+          tmp = self.changeHwNumberComputation(tmp, questionMarkCount)
+        
+        self.computation = tmp
         
         self.mnemolist = []
         Mnemo = cmpt.getElementsByTagName("Mnemo")
         if Mnemo:
           for mn in Mnemo:
             self.mnemolist.append(mn.getAttribute("name"))
+  
+  def changeHwNumberComputation(self, comp, counter):
+    firstPos = 0
+    lastPos = 0
+    for num in range(counter):
+      firstPos = comp.find('?"', lastPos + 1)
+      if(comp[firstPos-1] != ')'):
+        mnemonicBegin = comp.rfind('(', lastPos ,firstPos)
+        mnemonicSubstring = comp[mnemonicBegin:firstPos]
+        if mnemonicSubstring.count('(') > 1: 
+          return comp
+        comp = comp.replace(mnemonicSubstring, '('+ mnemonicSubstring + ')')
+        lastPos = firstPos + 2
+    return comp
 
 class ecu_identifications:
  
diff --git a/pyren/mod_ply.py b/pyren/mod_ply.py
index b6cc709..0af3eb5 100755
--- a/pyren/mod_ply.py
+++ b/pyren/mod_ply.py
@@ -197,7 +197,7 @@ class Calc(Parser):
     def p_expression_plus(self, p):
         'expression : expression PLUS expression'
         if type(p[1]) is str or type(p[3]) is str:
-          p[0] = str(p[1]) + str(p[3])
+          p[0] = str(p[1]).replace('"', '') + str(p[3])
         else:
           p[0] = p[1] + p[3]
     p_expression_plus.func_doc='expression : expression PLUS expression'