ABAP Upgrading steps from 4.6 to ECC 6.

Hi Experts,
Could you please let me know the steps to upgrade from 4.6 to ECC 6?
As an abapers what are the steps need to take care during upgradation.
Please give me the step by step approach.
Thanks
Kaki

Hi,
First you need to take inventory of all Z developments ( Reports, FM's....)
Find out the Impacted FM's and programs....!!!
check for all the cloned programs/Includes...
check if the system is unicode enabled.
SPAU corrections
SPDD corrections
If System if Unicode ( correct unicode errors )
correct the obsolete FM's and obsolete declarations.
Correction for errors at time of testing.....SAP notes will help a lot in correcting many errors..
post go live support ....!!!
Few important points :-
FM LIST_TO_SPOOL not in ECC6.0. use FM is LIST_TO_ASCII.
Table TVARV has become obsolete. New table TVARVC has been introduced. We copied data from TVARV to TVARVC. ( check SAP note for Details )
Took back up of data in table T512W to T512B .Data can be restored after upgrade using the report RPU12W0C. ( check SAP note for Details )
FMs like WS_UPLOAD and WS_DOWNLOAD are obsolete now. The new FMs are GUI_UPLOAD and GUI_DOWNLOAD.
New Debugger is introduced.....Debugging is easy and user friendly.
u'll have to change few BDC screen numbers.....whose Screen numbers are changed in ECC...( u'll come accross this errors in Unit testing)
let me know.......if you need any more information....As you start working on the Upgrade...!!!!
Regards,
Nikhil

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>     Can somebody give an idea on changes that took place while upgrading from 4.7 to ECC 5.0?
http://solutionbrowser.erp.sap.fmpmedia.com
http://service.sap.com/releasenotes
>     1. What are the major uni-code changes that we have in ECC 5.0 compared to 4.7? I know the unicode check is present in 4.7 too (like WS_UPLOAD & WS_DOWNLOAD are obsolete) But are there any major unicode checks that we have to deal with while upgrading to 5.0?
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sunandkumar wrote:
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e.c.c 6.0 to follow the unicode rules.
ABAP Development under Unicode
Prior to Unicode the length of a character was exactly one byte, allowing implicit typecasts or memory-layout oriented programming. With Unicode this situation has changed: One character is no longer one byte, so that additional specifications have to be added to define the unit of measure for implicit or explicit references to (the length of) characters.
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1.     Bit Statements
2.     Adding Field Sequences
3.     Loops with VARY and VARYING
4.     Creating Subroutines
5.     Saving Programs
6.     Assigning Types for GET/SET PARAMETER
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ADD n1 THEN n2 UNTIL nz [ ACCORDING TO sel ] GIVING m ...
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DO ... VARYING f FROM f1 NEXT f2.
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2.     A syntax error is triggered if it is recognizable statically that f1 and f2 are not part of the same structure.
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I have worked on a upgrade project from 4.6C to ECC 6.0.
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Edited by: Albert Joseph Canceran on Feb 8, 2008 12:24 PM
Edited by: Albert Joseph Canceran on Feb 8, 2008 12:25 PM
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