Exchanging data between client and server

[rihoe]

Hi!
I want to exchange CBase class between client and server. Sending data from to server works OK:

HBufC8* dataDes;
TRAPD(r,dataDes=aData->MarshalDataL());
if(dataDes)
messageParameters[1] = static_cast<TAny*>( dataDes) ;
TInt i=SendReceive( EMandelServRequestMandel, &messageParameters[0]);

But when I try to get the modified data back from server then I
get error code 2:

HBufC8* desData=HBufC8::NewL(size*(sizeof(TInt32)+sizeof(TReal32))+sizeof(TInt32));
TPtr8 readPtr(desData->Des());
aMessage.ReadL(aMessage.Ptr1(),readPtr);
iMandel= CMandelbrotData::NewLC(*desData); //I get my dataholder class initialized OK
...
making some changes in data
....
HBufC8* dataDes;
TRAPD(r,dataDes=iMandel->MarshalDataL());
if(dataDes)
aMessage.WriteL(aMessage.Ptr1(),*dataDes); ///<--- gives error
aMessage.Complete( KErrNone );

I'm doing something stupid here. Can anyone show me the correct way?

[rihoe]

Sorry, the error I get is not 2, but KErrBadDescriptor .