Marshalling a structure containing another structure in COM.

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COM

Hi,

I have 2 processes say Proc1.exe and Proc2.exe. Assume that Proc2.exe acts as a COM server and I want to send a complex user-defined structure to Proc1.exe.
Example:

struct str1
{
  string w1;
  string w2;
};
Struct str2
{
    int a ;

    str2 s1[3];
};

Now I have declared the above mentioned structures in the IDL file . And I have a method in my interface that takes str2 as a parameter.

Now when I invoke this method passing the relevant structure as the parameter from Proc1.exe to Proc2.exe , I keep getting a runtime error telling " The Stub received bad data". I am doing the structure initializatin correctly.

Is there something more I need to do?

Any help is really appreciated. Sample code wud be gr8.