I am new to JMP and I am trying to batch process many .csv files. My first hiccup is happening when I try to pull datetime information from the first column.My data table looks like

As you can see from the picture, each row of timestamps has an unwanted "-0800" tacked on the end How would I get rid of this for each entry? The jsl syntax I used looks something like
:loggingTime = Substr( :loggingTime , 1 , 23)
However when I run this, I just end up with an empty column. Lastly, I know to ultimately format the string into a datetime object I will need the "informat" command but my question there is can I select a format that records milliseconds and that doesnt just stop at seconds? I know this is simple stuff but as I said I am new to JSL and any help would be greatly appreciated.