Upgrade 4.6C to ECC 6.0; Unicode - non-Unicode -- Unicode

Hi,
My client has a R/3 4.6c UNICODE, he wants to upgrade to ECC6.0 UNICODE.
According to a SAP document, to upgrade, I upgrade directly to ECC 6.0 NON_UNICODE then convert the system to ECC 6.0 UNICODE.
I'm wonder why Unicode -> non-Unicode --> Unicode.
Regards,
Toan Do

"4.6C is not a unicode system ,ecc6.0 is an unicode system."
Actually, ECC 6.0 only has to be unicode if you are a new installation.  If you are upgrading from a non-unicode system, you can upgrade to a non-unicode ECC 6.0 system, this is fully supported by SAP.
However, it is recommended that you perform the upgrade and unicode conversion at the same time. SAP is going to force us to unicod some day anyway.
We have just completed a technical upgrade from 4.7 to ECC 6 non-unicode, and now we are looking at a unicode conversion project.  It would have added time to the original upgrade project, but it would have been worth it.
T

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