How to use $ symbol in a view

Hi,

How to escape/ or use $ symbol from (?PERRORs-s[^nr]+?(?=s[0-9]|$|[nr])) regex which is in below view

View :

<module name="URLLoader" layoutPanel="panel_row1_col1" group="Details" autoRun="True">
    <module name="Search">
        <param name="search">index="mwrap_idx"  sourcetype="CARApp" $excep$ | rex field=_raw "(?P<test>ERROR\s-\s[^\n\r]+?(?=\s[0-9]|$|[\n\r]))" | rename test as Exception | lookup Lookupcarexcep.csv  "Logged Text" AS Exception OUTPUT "Display Text" | table "Display Text" Exception _raw</param>
        <module name="SimpleResultsTable">
            <param name="entityName">results</param>
            <param name="drilldown">row</param>

            <module name="ConvertToDrilldownSearch">
              <module name="ViewRedirector">
              <param name="viewTarget">flashtimeline</param>
              <param name="popup">True</param>
              </module>
          </module>

It is giving me "Unbalanced quotes" error