Making ABAP sources Unicode compliant ... after Unicode conversion

Question

Hi,
I was asked by a customer if there is any problem with the following scenario :
A system must be converted to unicode. Unfortunately, not all the ABAP source codes will be unicode enabled on-time for the conversion.
The development team wanted to know if they can assign priorities to ABAPs and focus their manpower on these ABAPs only.
The rest of the ABAPs will be made unicode compliant AFTER the conversion of the system.
I am well aware that if ABAPs don't have the Unicode flag checked, the system won't allow their execution but will it still be possible to edit the source code of those non unicode ABAPs and enable them afterwards ? From a technical point of view, I can't find any reason why it shouldn't be possible but who knows ...
Thanks for your answers,

Answer 1

Hi,
Yes during upgade the unicode check comes into picture..
The first unicode version is 4.7,so from 4.7 to higher versions unicode is thre...below 4.7 say 4.c is non unicode .
one example is u can dclare a variable of type X in non-unicode system(4.6c) but not possible in unicode system(ECC6.0).
Check the below links for understanding of unicode.
[UCCHECK downporting;
[UCCHECK;
[http://www.sap.com/korea/Company/Events/techday05/img/data_01.pdf]
[http://www.sap-press.de/download/dateien/1240/sappress_unicode_in_sap_systems.pdf]
[Re: ECC 6.0 Upgrade & changes required in programs;