Conection between 7.3.3 and 10g

Hello world!
I have 2 db. One is Oracle 10g (Windows XP, installed on my desktop) and another one is Oracle 7.3.3 (installed on the same desktop but on the virtual machine with Windows NT).
I've tried to make connection from my 10g db (for instance, with sqlplus) but get this error message - ORA-03115.
From doc -
ORA-03115:     unsupported network datatype or representation
Cause:     A user bind or define, or an Oracle function, is not supported by this heterogeneous Net8 connection.
Action:     Upgrade the older version of Oracle and try again.
It is possible somehow to maintain data exchange between those two versions.
I interested in any ideas about bi-directional communication - even exp/imp.

user9098610 wrote:
The obvious question is "Why?" 7.3.3 is from a time when dinosaurs roamed the earth.The reason is quite simple - I have two systems - old one (on 7.3.3) and new system developed by our company.
And data between those systems should be daily synchronised (at night). It is desire of our customer.It simply is not going to happen.
I once had a system where we were stuck with an 8.1 client that had to connect to 10.2 database. It required 2 things:
1) the 8.1 had to be patched up to terminal release (8.1.0.4??)
2) we had to build an 8.1.0.4 database to act as a go-between. It had a db link to the 10.2, and and every app object in the 10.2 database had a corresponding synonym in the 8.1 db.
Don't know if this will work in your situation or not. It's a real kludge. Hopefully your management is starting to see the false economy of not staying reasonably current on their databases. When I was running 7.3 databases (that was where I got started with Oracle) it was on Windows 3.1. Are you as far behind on OS as you are on databases? Or does your management think databases can fall behind while everything else is kept current?

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