Kevin pointed out that you need to declare the data types. I usually quote the dates with this format.

DECLARE @Last_Date  datetime
DECLARE @Last_Time time 

SET @Last_Date='1899-12-30 00:00:00'
SET @Last_Time='00:00:00'

There may be a date setting that will accept the date you used?

Sql Anywhere also will accept ansi standard syntax instead of T-Sql. A small example.

begin 
DECLARE @Last_Date  datetime;
DECLARE @Last_Time time ;

SET @Last_Date='1899-12-30 00:00:00' ;
SET @Last_Time='00:00:00' ;
if <some condition> then 

end if ;

end 

>Obviously, SQL Anywhere cannot handle this syntax:
>
>

>DECLARE @Last_Date 
>DECLARE @Last_Time 
>
>SET @Last_Date=30/12/1899 00:00:00
>SET @Last_Time=00:00:00
>

>
>Anyone would know how we should define our SQL command parameters in that environment?