[selenium-users] Unable to extract a value from a xpath

Hi All,

I have an issue in using storeEval command ,my command goes like this.Here
I need to extract "n" value from the xpath
I am using.When I run this script an error is thrown stating:"[error]
Unexpected Exception: fileName ->
chrome://selenium-ide/content/selenium-core/scripts/selenium-api.js,
lineNumber -> 2531" please anybody can help me out with this error.What
should I do?

<tr>
<td>store</td>
<td>.//*[@id='N_AHR_ROLES_TBL$new$n$$0']/img</td>
<td>var</td>
</tr>
<tr>
<td>echo</td>
<td>${var}</td>
<td></td>
</tr>
<tr>
<td>storeEval</td>

<td>javascript{storedVars['var.substring(var.indexOf(&quot;$new$&quot;)+5,
str.indexOf(&quot;$$&quot;))']}</td>
<td>res</td>
</tr>
<tr>
<td>echo</td>
<td>${res}</td>
<td></td>
</tr>




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