Strange error of function usubinstr???

[gao weixuan]

Hi!
I want to use the function usubinstr() to replace unicode substring "我爱" in Unicode string variable named str which contains a unicode string "我爱中国 我爱北京", however it returns error: too few variables specified.
I don't konw why and can anyone please help me?
Thanks!

[daniel klein]

str1 is a data type. You may specify the data type with generate; cannot use datatypes as variable names.

[gao weixuan]

OH YES!!!
I didn't notice that! Thank you very much!!!