diff --git a/src/morevna.py b/src/morevna.py
--- a/src/morevna.py
+++ b/src/morevna.py
@@ -25,10 +25,12 @@ def buildTree(args):
 
 def push(args):
 	_checkFile(args.datafile)
+	if args.tree:
+		_checkFile(args.tree)
 	if args.host: conf.hosts.insert(0,args.host)
 	if args.port: conf.port=args.port
 
-	c=Client(args.datafile)
+	c=Client(args.datafile,args.tree)
 	with ClientConnection() as con:
 		c.setConnection(con)
 		blocksToTransfer=c.negotiate()
@@ -38,10 +40,12 @@ def push(args):
 
 def pull(args):
 	_checkFile(args.datafile)
+	if args.tree:
+		_checkFile(args.tree)
 	if args.host: conf.hosts.insert(0,args.host)
 	if args.port: conf.port=args.port
 
-	c=Client(args.datafile)
+	c=Client(args.datafile,args.tree)
 	with ClientConnection() as con:
 		c.setConnection(con)
 		blocksToTransfer=c.negotiate()
@@ -74,12 +78,14 @@ pBuild.set_defaults(func=buildTree)
 pUpdate=subparsers.add_parser("push")
 pUpdate.add_argument("-p","--port",type=int)
 pUpdate.add_argument("--host",default="127.0.0.1")
+pUpdate.add_argument("-t","--tree",help="stored hash tree location")
 pUpdate.add_argument("datafile")
 pUpdate.set_defaults(func=push)
 
 pUpdate=subparsers.add_parser("pull")
 pUpdate.add_argument("-p","--port",type=int)
 pUpdate.add_argument("--host",default="127.0.0.1")
+pUpdate.add_argument("-t","--tree",help="stored hash tree location")
 pUpdate.add_argument("datafile")
 pUpdate.set_defaults(func=pull)