I upgrade my System to 2.11.0. But it seems that there is some thing different. such as that: string couldn't be declared with object type among the modules. (I use scriptstring as string type) EX: MODULE1 string TEST(const uint op) { string s="test"; return s; } void main() { TEST(1); } MODULE2 import string TEST(const uint) from "MODULE1"; void main() { TEST(2); } If I build MODULE1 and run it , It is OK. But if I build MODULE2, MODULE1, and Binding, it will result in Binding Error! I must rewrite the codes: MODULE1 string@ TEST(const uint op) { string s="test"; return @s; } void main() { TEST(1); } MODULE2 import string@ TEST(const uint) from "MODULE1"; void main() { TEST(2); } It seems that, In the import function, I could only use string handle as parameter type ? Am I right. Or could I change the string registration to support instance? Thanks a lot.

OK!
I found the answer from source code (as_builder.cpp)

line 585

// Reference types cannot be returned by value from system functions
if( (func->returnType.GetObjectType() &&
(func->returnType.GetObjectType()->flags & asOBJ_REF)) &&
!(func->returnType.IsReference() ||
func->returnType.IsObjectHandle()) )
return asINVALID_DECLARATION;

In conclusion, If I want to use string reference, I should change all import functions. And this is a big trouble for me.

Thanks a lot.
Now the 2.11.1 is working for me.