[omniORB] Marshal exception

[Luke Deller]

vaibhav jha wrote:
> I am using omniorbpy,activestate python 2.1.1 on windows nt 4.0 
> workstation.I am trying to pass a dictionary as a parameter of hte 
> function called by client through the corba server.

CORBA is stricter about the types of function parameters than Python.

In your idl definition you have:

>   typedef sequence<long> Seq;
>   interface Echo {
>     echoString(in Seq mesg);
>   };

The above is not correct IDL because echoString needs a function result.. 
I suppose you meant:
       void echoString(in Seq mesg);

Anyway, your IDL says that echoString must only be called with a parameter 
which is of type "Seq" which is an alias for "sequence<long>".

In Python, the CORBA IDL type "sequence<long>" corresponds to a list of 
integers.  So you must call this function with a list of integers.  If you 
pass any other type (a dictionary for example) then you will get a 
CORBA.Marshal exception, as you have discovered :-)

Luke.