APEX Integration with EBusiness 12.1.3

Question

I am trying to connect to an APEX app thru EBS and skip the logon page. I have followed Rod West's document http://www.oracle.com/technetwork/developer-tools/apex/apex-ebs-wp-cabot-consulting-169064.pdf ] ). I've also been searching thru postings reading any info provided by others who have had trouble getting this working but have not seen the error I'm getting.
FYI - using Apex 3.2 (I know it's old!) EBS R12 12.1.3; APEX is on another domain and in another schema.
I am getting very close because if I hardcode the username in the Onload process, it works great - creates new password, skips 2nd logon page, etc. Where I'm having the problem is with wfa_sec.getsession. I've tried wrapping it in another package and anything else I can think of and always get the error below:
ORA-20002: 3403: Internal: error while getting session information. -6502: ORA-06502: PL/SQL: numeric or value error: character string buffer too small ORA-06512: at "SYS.HTP", line 1515 ORA-06512: at "SYS.HTP", line 1735 ORA-06512: at "APPS.ORACLEAPPS", line 1111 ORA-06502: PL/SQL: numeric or value error ORA-06512: at "APPS.ICX_SEC", line 2387 ORA-06502: PL/SQL: numeric or value error ORA-06512: at "SYS.OWA_UTIL", line 356 ORA-06512: at "SYS.HTP", line 1368 ORA-06512: at "SYS.HTP", line 1443 ORA-06512
So then I created a simple procedure to run thru EBS as a concurrent program to just call the same package
create or replace package sko_session_pkg as
procedure getsession
(errbuf out varchar2, retcode out varchar2);
end sko_session_pkg;
create or replace package body sko_session_pkg AS
PROCEDURE getsession (errbuf out varchar2, retcode out varchar2) IS
p_user varchar2(320) := NULL;
begin
wfa_sec.getsession(p_user);
end getsession;
end sko_session_pkg;
When I run this procedure I get the same error:
**Starts**12-JUL-2012 19:10:22
ORACLE error 20002 in FDPSTP
Cause: FDPSTP failed due to ORA-20002: 3403: Internal: error while getting session information. -6502: ORA-06502: PL/SQL: numeric or value error: character string buffer too small
ORA-06512: at "SYS.HTP", line 1515
ORA-06512
Output file size:
0
Has anyone encountered this error when accessing wfa_sec.getsession?
Any help would be greatly appreciated and thanks in advance!
Sandie

Answer 1

Rod,
I thought I should attempt to get your LaunchApex.jsp provided in Figure 9 from your document working before I added additional code to call the get_apex_url.
LaunchApex.jsp compiled successfully and the apps server was bounced but getting Page Not Found error. Without the get_apex_url code in LaunchApex.jsp, I was expecting it to just bring up the APEX login screen (like the GWY.jsp does). FYI - I'm calling this from EBS responsibility/menu pointing to Function 'APEX_LOGIN'; type=SSWA jsp function; HTML Call=LaunchApex.jsp?&application=614&page=3140
The url that shows when I get the page not found is
http://....../OA_HTML/RF.jsp?function_id=51525&resp_id=64694&resp_appl_id=0&security_group_id=0&lang_code=US&params=JGFTjw4wmhX6TenmVQJ4IGGtVKZXnnU1EV.XsJrX5us&oas=xn4Xk7Bp9SgoTpjrieP_Zw..
Where is the RF.jsp coming from???? There's a call in the jsp to validate the session so thought maybe it wasn't able to do that and is just returning.
If I type url
http://..../OA_HTML/LaunchApex.jsp? I get same 'Page Not Found'.
Thx for all of your help!
Sandie