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set condition when end user selects 'BACK' button in CJ20N transaction

Active Participant
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hello all,

we have a Z-transaction (from which the end user can create a new WBS number or edit an existing WBS number by calling CJ20N ) ,

after calling Cj20N as shown above , when the end user clicks 'BACK' or 'CANCEL' or 'EXIT'   the control is going to the Z-transaction ,

but my condition is when 'BACK' or 'CANCEL' or 'EXIT'  is selected instead of directly going to  Z-transaction  , i wanted to check for some condition

i.e if there is no network number then it should not allow going back(when user selects 'BACK' button)...

how do i achieve this condition...

thanks in advance...


Former Member
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It is not possible in the calling program.

You have to enhance standard program via customer_exit or badi or enhancement point.



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hi omar,

do u have any idea of which exit gets triggered when back button is clicked,

i tried with with some exits starting with CNEX*, but none of them is getting triggered when BACK

button is selected in CJ20N...

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Maybe enhancement point :

ENHANCEMENT-POINT ehp_lcnpb_mf55_01 SPOTS es_saplcnpb_m_ps.