Query mode of Master Detail Form

Question

I have a master-detail form.
I'm passing parameters to that form to autoquery data.
Everything works fine but "Next" button in a detail block.
I'm getting:
An unexpected error occurred: ORA-06502: PL/SQL: numeric or value error: NULL
index table key value (WWV-16016).
After autoquery LASTIN_SET variable of DEFAULT block is set "5" (number of rows in detail block).
When I click on "Next" button LASTIN_SET variable is set to "0" instead of "5" and that causes a problem.
So, somehow LASTIN_SET is not preserved between clicks.
In fish_size_form master-detail form
... before displaying the page
shrimp.p_set_parameter_fish_size(p_session,
p_block_name,
p_object_name,
p_instance,
p_event_type,
p_user_args
This is a code of shrimp.p_set_parameter_fish_size
p_session in out nocopy portal92.wwa_api_module_session,
p_block_name varchar2,
p_object_name varchar2,
p_instance varchar2,
p_event_type varchar2,
p_user_args varchar2
is
sess_store portal92.wwsto_api_session;
status varchar2(80);
station varchar2(80);
date_time varchar2(80);
sample varchar2(80);
species_code varchar2(80);
form_state varchar2(100);
begin
form_state := p_session.get_value_as_varchar2(
p_block_name => 'MASTER_BLOCK',
p_attribute_name => '_FORM_STATE');
if form_state = 'QUERY_AND_SAVE' then
sess_store := portal92.wwsto_api_session.load_session(
p_domain => 'sfnrc',
p_sub_domain => 'shrimp');
status := sess_store.get_attribute_as_varchar2(p_name => 'status');
if status = 'apply' then
station := sess_store.get_attribute_as_varchar2(p_name => 'station');
if station is not null then
p_session.set_shadow_value(
p_block_name => 'MASTER_BLOCK',
p_attribute_name => 'A_O_S_M_O_STATION__ID_K',
p_value => '='||station,
p_language => portal92.wwctx_api.get_nls_language );
end if;
date_time := sess_store.get_attribute_as_varchar2(p_name => 'date_time');
if date_time is not null then
p_session.set_shadow_value(
p_block_name => 'MASTER_BLOCK',
p_attribute_name => 'A_O_IN__SAMPLE_IN__DATE_TIME_K',
p_value => '='||to_char(to_date(date_time,'yyyy/mm/dd hh24mi'),'yyyy/mm/dd hh24:mi'),
p_language => portal92.wwctx_api.get_nls_language);
end if;
sample := sess_store.get_attribute_as_varchar2(p_name => 'sample');
if sample is not null then
p_session.set_shadow_value(
p_block_name => 'MASTER_BLOCK',
p_attribute_name => 'A_OBSERVED_IN__SAMPLE_NUMBER_K',
p_value => '='||sample,
p_language => portal92.wwctx_api.get_nls_language);
end if;
species_code := sess_store.get_attribute_as_varchar2(p_name => 'species_code');
p_session.set_shadow_value(
p_block_name => 'MASTER_BLOCK',
p_attribute_name => 'A_S_I_PROJECT_SPECIES_CODE_K',
p_value => '='||species_code,
p_language => portal92.wwctx_api.get_nls_language );
sess_store.set_attribute(p_name => 'status',p_value => 'done');
sess_store.save_session;
p_session.save_session;
fish_size_form.wwv_master_gensys_1(
p_block_name => p_block_name,
p_object_name => p_object_name,
p_instance => p_instance,
p_event_type => p_event_type,
p_user_args => p_user_args,
p_session => p_session );
end if;
end if;
end;
What I'm missing here.
Aantoliy.

Answer 1

Say, I click on Update Push button. This will invoke a LOV that will occurs 5 times and then display the header and detail record.
Even if, I am able to get the records in the canvas, I am not able to update the records of the master. The record_status is in INSERT mode of the header block. Interestingly, if i click 2nd time on update button and then get the records after executing LOV, the query enters the query mode and I am able to update the records then.
Please suggest how to overcome the problem on a sigle click on UPDATE button.