<p>It sounds like there is a problem in the locally stored block store file.
You should be able to solve this by doing the following:</p>

<p>Find where MultiBit is storing your user data - this is shown on the very first line in the 'Message' tab when you start up MultiBit. (It is also explained in the help in 'Troubleshooting'.)</p>

<p>Shut down MultiBit</p>

<p>Go to your MultiBit user data directory - worked out above - and delete the file multibit.spvchain</p>

<p>Start up MultiBit again</p>

<p>MultiBit then syncs from a month or two ago and you should be running ok at that point.</p>

CC BY-SA 3.0
2013-11-15T17:15:10.613Z
I already tried it
Flole
CC BY-SA 3.0
2013-11-15T09:08:55.537Z
2013-11-15T09:08:55.537Z
jim618
<p>I installed MultiBit a few weeks ago and today it's not loading anymore. It displays the following Error in the logs:</p>

<p><code>
    The Blockchain "C:\Users\USER\AppData\Roaming\MultiBit\multibit.spvchain" could not be loaded. The Error was "org.jboss.netty.channel.ChannelException Failed to create a selector.".
</code></p>

<p>I already tried deleting that file and then let multibit recreate it, but it doesn't help.</p>

<p>What am I doing wrong?</p>

CC BY-SA 3.0
2013-11-15T15:59:34.160Z
Can you see if you are using an older version of Java ? If you do 'java -version' on the command line you should see a version number something like : 1.7.0_40-b43. If it is significantly older than that e.g. 1.6.x then it would be worth updating it and trying again.
jim618
CC BY-SA 3.0
2013-11-15T17:14:54.223Z
It says 
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)
Flole
<blockchain><client><multibit><thin-clients><error>
Multibit - Failed to create a Selector
Flole
# Multibit - Failed to create a Selector

(Asked by: username_0 on 2013-11-14)

I installed MultiBit a few weeks ago and today it's not loading anymore. It displays the following Error in the logs:

`The Blockchain "C:\Users\USER\AppData\Roaming\MultiBit\multibit.spvchain" could not be loaded. The Error was "org.jboss.netty.channel.ChannelException Failed to create a selector.".`

I already tried deleting that file and then let multibit recreate it, but it doesn't help.

What am I doing wrong?

**Tags:** blockchain, client, multibit, thin-clients, error

> **Comments:**
> **username_1**: Can you see if you are using an older version of Java ? If you do 'java -version' on the command line you should see a version number something like : 1.7.0_40-b43. If it is significantly older than that e.g. 1.6.x then it would be worth updating it and trying again.  
> **username_0**: It says  java version "1.7.0_45" Java(TM) SE Runtime Environment (build 1.7.0_45-b18) Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)  

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## 1 answers

### Answer by username_1 on 2013-11-15. Score: 1

It sounds like there is a problem in the locally stored block store file.
You should be able to solve this by doing the following:

Find where MultiBit is storing your user data - this is shown on the very first line in the 'Message' tab when you start up MultiBit. (It is also explained in the help in 'Troubleshooting'.)

Shut down MultiBit

Go to your MultiBit user data directory - worked out above - and delete the file multibit.spvchain

Start up MultiBit again

MultiBit then syncs from a month or two ago and you should be running ok at that point.

> **Comments:**
> **username_0**: I already tried it  

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