Technical difference between ECC5.0 and ECC6.0

Hi everyone,
Can anybody tell me whats is the Technical difference between ECC5.0 and ECC6.0.
I am doing upgrade from ECC5.0 to ECC6.0 in Retail.
Regards,
Divya

Dear Divya,
When it is a technical upgrade from a lower version to ECC6.0, many objects like includes, Function modules, reports, OSS notes, DDIC objects, BDC/Print programs, SAP scripts, screens will get affected due to the upgradation. So we need to check with all these objects.
u2022 We will encounter short dumps while executing certain programs. This may be due to the usage of obsolete function modules or Unicode errors.
u2022 The BDCs in the upgraded version will become defective as many of its screen field names will be changed during version change.
u2022 Program texts of many programs will be lost. They have to be restored.
u2022 In case of tables, enhancement category has to be provided.
u2022 There is a possibility of losing the variants during upgradation. So care should be taken to retain them before upgradation.
u2022 ECC6.0 is case sensitive, so many of the interface programs will fail to transfer (FTP) files between systems. These objects have to be changed so that the commands passed to the external system be UPPERCASE.
So a developer should be aware of the following:
u2022Unicode programming is followed in ECC6.0. So we need to be aware of it to rectify certain Unicode errors which are likely to occur.
u2022You have to run the transactions SPAU & SPDD to check for list of standard & custom objects that needs modification in the upgraded version.
Check the below link to find more details on usage of SPAU & SPDD transactions
http://help.sap.com/saphelp_nw2004s/helpdata/en/60/d6ba7bceda11d1953a0000e82de14a/content.htm
u2022Should be aware of the objects that have become obsolete in ECC6.0. They have to be replaced by appropriate ones.For eg.:
--> The WS_* function modules have been replaced by GUI_* FMs in ECC6.0 as WS_* FMs have become obsolete from 4.7
-->Tables like TVARV & TTREX have been replaced by TVARVC & TTREXN respectively in ECC6.0.
u2022In case of tables, we need to specify the Enhancement category.
u2022Due to upgradation, we will lose out some variants. So we should take a back-up before proceeding with the upgradation.
u2022In case of BDC programs, some field names will be changed. So they have to be named appropriately.
Please check with the below links for more details:
SAP Upgrade guide:
http://www.thespot4sap.com/upgrade_guide_v2.pdf#search=%22upGRADE%20STEPS%20-%20SAP%22
From ABAP's perspective, the following link helps you:
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/5ac31178-0701-0010-469a-b4d7fa2721ca
For technical upgrade inputs:
https://www.sdn.sap.com/irj/sdn/wiki?path=/display/profile/2007/05/07/upgradeFROMR3TOmySAPERP-PARTII&
https://wiki.sdn.sap.com/wiki/display/profile/UPGRADEFROMR3TOmySAPERP-PARTIII
Hope this helps you.
Regards,
Rakesh

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