When using the below function, 

@FormatDateTime("20210909T010101.000 GMT", "","America/Vancouver","") 

i get output as 

Now, because of this extra element "(CA)", this value cannot be used to set to any DateTime property or perform any DateTime operation such as AddToDate. It gives error as below

[STACK][com.pega.pegarules.pub.clipboard.InvalidParameterException: value 20210719T091045.748 PDT (CA) is not a valid Date or DateTime string. Details: Invalid value for theDate passed to com.pega.pegarules.exec.internal.util.PRDateTimeUtilsImpl.addToDate(String, String, String, String, String)<CR> at com.pega.pegarules.exec.internal.util.PRDateTimeUtilsImpl.addToDate(PRDateTimeUtilsImpl.java:174)<CR> at com.pegarules.generated.addToDate_080101_1506794947446549432.addToDate08_01_01(addToDate_080101_1506794947446549432.java:119)<CR> at com.pegarules.generated.addToDate_080101_1506794947446549432.invoke(addToDate_080101_1506794947446549432.java:74)<CR>

We are trying to perform the below below function

@addToDate(@FormatDateTime(Param.FromDate, "", OperatorID.pyDefaultTimeZone, ""), "1", "0", "0", "0")

Can someone please help to debug the issue