Multichain installation in windows 7

Question

Hi All,

I installed Multichain in window 7. I followed below step:
1. multichain-util create x
2. multichaind x -daemon

I got this msg in console.

MultiChain Core Daemon build 1.0 beta 1 protocol 10008

Looking for genesis block...
Genesis block found

Other nodes can connect to this node using:
multichaind vipul@192.168.2.2:7361

Node started

After i that i am going to start up other node but i am facing below error.

E:\multichain>multichaind vipul@192.168.2.2:7361

MultiChain Core Daemon build 1.0 beta 1 protocol 10008

IO error: C:\Users\vipul\AppData\Roaming\MultiChain\vipul\permissions.db\MANIFEST-000002: The handle is invalid.

ERROR: Couldn't initialize permission database for blockchain vipul. Probably multichaind for this blockchain is already running. Exiting...

I tired but i did not get any solution. Please help me.

Thanks in advance!

 

 

Comments

I am also facing the same issue using a c# code whereas i just want to start one node from a machine and will connect using other machine. Provide help.I am able to create a chain but not start it. Below is my code:

   Process p = new Process();
            p.StartInfo.FileName = "cmd.exe";
            p.StartInfo.WorkingDirectory = @"D:\Work\Blockchain";
            p.StartInfo.CreateNoWindow = true;
            p.StartInfo.RedirectStandardInput = true;
            p.StartInfo.RedirectStandardOutput = true;
            p.StartInfo.UseShellExecute = false;
            p.Start();
            //p.StandardInput.WriteLine("multichain-util create chain10");
            p.StandardInput.WriteLine("multichaind chain10 -daemon");
            //p.StandardInput.WriteLine("cd..");
            p.StandardInput.Flush();
            p.StandardInput.Close();
            p.WaitForExit();
            Console.WriteLine(p.StandardOutput.ReadToEnd());

Answer 1

If you are running multiple nodes on the same computer, you need to use the -datadir option to ensure that each one is using a different directory. See this page for more information:

http://www.multichain.com/developers/runtime-parameters/

Comments

Thank you. provide me guide

Answer 2

if you were writing c# code with process - its very likely you are running multichaind in the processes and not seeing it as a window. 

 p.StartInfo.CreateNoWindow = true;

Check your processes in taskmanager and its probably still running from one of your previous code runs.