str1 ="11/09/2019 03:17:43" 'this is date time sample it got from b4j server
Do While str1.Contains(" ")
str1 = str1.Replace(" ","|")
Loop
Dim serverDateTime() As String
serverDateTime = Regex.Split("\|", str1.Trim)
DateTime.DateFormat = "MM/dd/yyyy"
DateTime.TimeFormat = "HH:mm:ss"
Dim ServerTick As Long = DateTime.DateTimeParse(serverDateTime(0), serverDateTime(1)) ->error in iOS 13.2.2