ORA-06550: line 8, column 21: PLS-00306: wrong number or types of arguments

Question

Hello,
I have a form page that inserts rows to a table by using a custom plsql which is defined via application process. the process is shown as:
DECLARE
v_loop NUMBER := trunc(:P43_SEG_SCH_DEP_DT2) - trunc(:P43_SEG_SCH_DEP_DT);
v_date date;
BEGIN
FOR v_LoopCounter IN 0..v_loop LOOP
v_date := trunc(:P43_SEG_SCH_DEP_DT) + v_LoopCounter * interval '1' day;
INSERT INTO slf_segment (id,
seg_sch_dep_dt,
dep_port,
arr_port,
bblf,
bslf)
VALUES (NULL,v_date,:P43_DEP_PORT,:P43_ARR_PORT,:P43_BBLF,:P43_BSLF);
END LOOP;
commit;
END;
Simply, there are two dates and for loop runs for as many times as the difference between two days. At each run, it inserts a row that adds 1 day to the start date.
I have tested the code in pl/sql developer and it runs perfectly. The table created as follows:
create table SLF_SEGMENT
ID NUMBER not null,
SEG_SCH_DEP_DT DATE,
DEP_PORT VARCHAR2(30),
ARR_PORT VARCHAR2(30),
BBLF NUMBER,
BSLF NUMBER
And I got the error which is the subject of my topic. Any help?

Answer 1

mertov wrote:
v_loop NUMBER := trunc(:P43_SEG_SCH_DEP_DT2) - trunc(:P43_SEG_SCH_DEP_DT);
v_date := trunc(:P43_SEG_SCH_DEP_DT) <tt>trunc</tt> takes number or date parameters. APEX page items are stored in session state as character strings, so in these instances need to be converted into <tt>DATE</tt> values. It's best to do this explicitly, rather than relying on implicit conversion:
trunc(to_date(:P43_SEG_SCH_DEP_DT, 'DD/MM/YYYY' /* Format mask used in P43_SEG_SCH_DEP_DT item */))