<p>
There are two likely possibilities. First, its likely that your tokens may have expired. You can check this by running <tt>tokens</tt>. If they are, in fact, expired (or missing) get new tokens as follows: first, make sure you have valid kerberos tickets and then run <tt>aklog</tt>. Another possibility is that you have tokens but not for the correct cell. <tt>tokens</tt> will tell you what tokens you already have. In all likelihood, if you are reading this, you probably want <tt>aklog athena sipb</tt>. Finally, a third possibility is that your group membership has changed since you acquired tokens. Try running <tt>aklog -force</tt>
<p>
There are two likely possibilities. First, its likely that your tokens may have expired. You can check this by running <tt>tokens</tt>. If they are, in fact, expired (or missing) get new tokens as follows: first, make sure you have valid kerberos tickets and then run <tt>aklog</tt>. Another possibility is that you have tokens but not for the correct cell. <tt>tokens</tt> will tell you what tokens you already have. In all likelihood, if you are reading this, you probably want <tt>aklog athena sipb</tt>. Finally, a third possibility is that your group membership has changed since you acquired tokens. Try running <tt>aklog -force</tt>