Field Exit CJCAJONR help!!

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Hi,

I am writing a field exit, and I need to import from memory the parameter 'CJCAJONR', but when I do it the value is empty.

The transaction that I am using is FBCJ. What I want to do is to validate the fields 'company code' (TCJ_C_JOURNALS-COMP_CODE) and 'cash journal'(TCJ_C_JOURNALS-CAJO_NUMBER) to match with a Z table when changing cash journal.

I got both parameters KUN (company code) and CJCAJONR (cash journal), with:

DATA: mem_bukrs LIKE tcj_c_journals-comp_code. DATA: mem_caj_no LIKE TCJ_C_JOURNALS-CAJO_NUMBER.

GET PARAMETER ID 'BUK' FIELD mem_bukrs.

GET PARAMETER ID 'CJCAJONR' FIELD mem_caj_no.

But when I check the variable´s values mem_bukrs is full but mem_caj_no is empty.

Any idea where can I get the value for the parameter 'CJCAJONR'?

Also I checked the ABAP memory but could not find it.

Thanks!!