Prohibit new Time Entries and Expenses; Allow old ones to be posted

Question

Hello Experts,
We only use PS with WBSes only (no network activity confirmation)
As wel we use CATS and Travel Management.
We post Time entries via transaction CAT 2 and expenses via PR05.
We have a business scenario, where we have to cancel a project - using a User Status 'CANCELLED'.
We need to differentiate between Time and Espenses posted before and after this status has been set: New ones prohibited,existing ones allowed to be further processed.
We need to prohibit NEW Time and Expenses postings - when the user runs CAT2 or PR05 - the behavior should be similar to teh message that we get when teh WBS status is CREATED.
However we have to ALLOW the approval of T&E and transfer to Controlling for the Time and Expenses that have already been posted before the Project was set tu User status 'cancelled'.
How can we solve this puzzle? Is it a combination of user statuses / transactions or a user exit we have to implement.
It seems that in order o prohibit Time entries the business tansaction 'Actual Activity Allocation' has to be prohibited, butthis prohibits both new time entries as well existing ones to be posted to Controlling.
Same for expenses - only that the business transaction is  FI : Postings - prohibited - but it prohibits too much - both new and existing expenses.
Your advise will be highly appreciated.
Thank you,
LT

Answer 1

Hi,
  I hope you can use two exits for the validation data with respect to appropriate status from JCDO table along with date for the mentioned WBS element to code, i.e. it for the validation of the entry to be posted whether time or expense.
For CATS : CATS0003
For Travel Expense : RPRCST01
Regards
Avisek Bhardwaj