diff --git a/common/rr2vv.py b/common/rr2vv.py
index abb5d7a426717b03accb231bac95152b1b2ff86d..2bf28b0ac7b520c4a0722d2e00804d273b4a4c30 100644
--- a/common/rr2vv.py
+++ b/common/rr2vv.py
@@ -36,8 +36,11 @@ class VME_rr_compatible(VME):
 	    raise BusWarning("Warning: VME __init__: Bad lun, default to 0")
 
     def iread(self, bar, offset, width):
-        return self.vv_read(offset)
+        data = self.vv_read(offset)
+        #print("vv_read : offset:0x%4x data:0x%08x"%(offset, data))
+        return data
 
     def iwrite(self, bar, offset, width, datum):
+        #print("vv_write: offset:0x%4x data:0x%08x"%(offset, datum))
         return self.vv_write(offset, datum)