Pass parameter from report to report generates error

Question

I am new to Portal. Please help me with this one.
I created two reports using report wizard. Report A lists termination infor group by leaving reasons. Report A takes two parameters: p_termination_date_from, p_termination_date_to.
When Report A is returned, user is supposed to be able to click on termination reason and go to report B, which has more detail of who is terminated under that reason. Report B takes three parameters:
p_Leaving_reason,
p_termination_date_from,
p_termination_date_to.
All these three are passed from Report A.
I use link to pass p_leaving_reason, but not able to use link to pass termination dates. So I use "a href= ..." to pass termination dates in Report A. The report is created without error. But when I run it, it gives me the following error:
Error: Unable to perform query (WWV-10202)
ORA-01858: a non-numeric character was found where a numeric was expected (WWV-11230)
Here is my Report A Statement:
===========================================
select a.LEAVING_REASON, a.meaning, count(distinct(a.EMPLOYEE_NUMBER)) people
from tableA a
WHERE
a.ACTUAL_TERMINATION_DATE >= ''||:P_TERMINATION_DATE_FROM||''
AND
a.ACTUAL_TERMINATION_DATE <= '<a
href="report_b?p_arg_names=P_TERMINATION_DATE_TO&p_arg_values='||:P_TERMINATION_DATE_TO||'">'||:P_TERMINATION_DATE_TO||'</a>'
GROUP BY a.LEAVING_REASON, a.MEANING;
And Report B select statement:
================================
Select * from tableB b
where b.termination_date>=:p_termination_date_from
and
b.termination_date<=:p_termination_date_to;
I appreciate your help.

Answer 1

Update:
Now I put a to_char in front of a.actual_termination_date, it does not give me that error any more. But it doesn't return any row.
Looks like it ignores the value I put in the parameter form. Please help. thank you.
Here is the updated statement for report A:
==============================================
select a.LEAVING_REASON, a.meaning, count(distinct(a.EMPLOYEE_NUMBER)) people
from tableA a
WHERE
to_char(a.ACTUAL_TERMINATION_DATE, 'dd-mon-yyyy') >= ''||:P_TERMINATION_DATE_FROM||''
AND
to_char(a.ACTUAL_TERMINATION_DATE, 'dd-mon-yyyy') <= '<a
href="report_b?p_arg_names=P_TERMINATION_DATE_TO&p_arg_values='||:P_TERMINATION_DATE_TO||'">'||:P_TERMINATION_DATE_TO||'</a>'
GROUP BY a.LEAVING_REASON, a.MEANING;