Groovy - Issue calling calc script template inside a groovy script

Summary:

I have a groovy rule that executes a calc that references a Template. I am passing the template name using a variable.

I am getting a generic error. If I print the calcScript, that is giving the correct result, but the rule is unable to compile it.

Any help on this will be of great help.

/*Code Snippet*/

Cube cube = operation.application.getCube("WFPln")
String TempName = "Test_Script"

StringBuilder calcScript = StringBuilder.newInstance()

calcScript << """

FIX("BU_None")

%Template(name:="${TempName}",application:="JLLFPA",plantype:="WFPln",dtps:=())

ENDFIX
"""

println calcScript
cube.executeCalcScript(calcScript.toString())

Error:

A method called by the script failed on line: 17, with error: Invalid Calc Script syntax [