In Dashboard: Remove Underscore in token

[Splunkmm]

Hi, I have a token as below in my dashboard,

                  <set token="mySource">replace($numSuffix$,"_","")</set>

and I have another token utilising the above,

                 <set token="source">$indexg$ connection $mySource"</set>

In Query I have,
                   <search>

                         <query>$source$ | timechart count by host </query>
                 </search>

Unfortunately this is not working, In splunk section query, its not evaluating.

Its reflecting as,

                           index=xer connection replace(_45t66,"_","") | timechart count by host

I tried with 
                         <set token="mySource">replace($numSuffix|s$,"_","")</set>
But its of no use.

Can someone help me with this? 

Thanks.

[Splunkmm]

Thank you so much for the response and yes it worked.

[ITWhisperer · Accepted solution]

Try using eval rather than set

<eval token="mySource">replace($numSuffix$,"_","")</eval>