${StrRep} and Unicode

Hello,
I'm using the code for the ${StrRep} function taken from http://nsis.sourceforge.net/StrRep in a separate nsh file.
The problem is, when I use

Unicode true

I get error
I see the function is doing nothing special. How can I resolve this issue?

Regards,
Alex

Put the Unicode attribute at the start of your .nsi

Yes, this is obvious, but I was looking for a more elegant solution. How can several Exch and Push commands mess up compression?

Once you start adding code to a section/function the Unicode mode is locked. Technically I believe you can do Push "" etc. but once a non-empty string is used the mode is locked.

You must put code in a macro if you want to delay something.

Yes, you're right, even this code produces the error:

Function blah

	Push $R0

FunctionEnd

Unicode true

even if I use the function at a much later state...