Set Date And String as a pramameter Value in RTF?

Hi Folks,

I want to set the parameter value as a String or date while declare the parameter in RTF template?  Please help me achive this?

For that I have already try  like below I've stated:

For Date:

<?param@begin:InvThresh;'10-DEC-18'?>

Param = <?$InvThresh?>

When I preview the  RTF template

Param  :NaN

For String:

<?param@begin:param1;'Welcome'?>

Param Value = <?$param1?>

When I preview the  RTF template

Param Value

Thanks,

Seethu