Enhancement :Requisitions and Job posting

Question

I know badi  for e-recruitment:- HRRCF00_GET_EXT_CODE .
and as per my requirement ..plz provide me solution
The Reference Code should be auto generated with an identifier for the company which the vacancy belongs to, following an identifier for the year and a sequential number and a suffix identifying whether the posting channel is internal or external.
On a requisition (Object type NB) the branch is selected. u201CLocationu201D is assigned to u201CInstituteu201D.
Location = T77RCFBRANCHCOMP-COMPANY (Get the long text from table T77RCF_COMPANY)
Institute = HRP5162-BRANCH
u2022     The same company identifier and year must be applied for the same published requisition. The sequence number generated will differ as the reference code must be unique.
u2022     For the company identifier, a custom table needs to be developed and maintained where the companies defined in table T77RCF_COMPANY are mapped to a 1-3 character long identifier.
u2022     The identifier for u201CYearu201D must be based upon the date for when the requisition was created u2013 not published.
The sequence number should be unique within each company, i.e.
u2022     W-09-00001-E
u2022     W-09-00002-I
u2022     A-09-00001-E
Note: The sequence number needs to be updated in the table so the last used number is kept and when a new publication is created, the next number should be used.
The posting channel can be derived from field CANDIDATE_CLASS (db table: T77RCF_POSTCHN)
Example:
W-09-00001-E

Answer 1

Excellent Andy.
Thank you so much. When I used this service in the role, I am able to see the dashboard and the requisitions raised by the recruiting manager.
You deserve full points
Another issue is: when I click on the requisition and hit "Job Posting", I am getting this error (please see attached screen shot). The same error is displayed when clicked on the requisition from the dashboard.
Even the requisition status is "Draft" and not released.