Connection, and Tickers

[Christophe]

Hello there,

I finally got profitpy to run. yoohoo.
The software looks quite nice. Congrats.

At the moment, I'm just trying to display a graph, but I'm having some
difficulties.

When I click on "connect" in the connection tab, the following message
appears in TWS demo: "reqMktData() takes exactly 4 arguments (5
given)". and "unable to connect".

The other issue I have at the moment, is that I can't add any more
tickers. Is that normal? The search text box is greyed out. Maybe this
is related to the connection error?

There are a few more questions I'd like to ask about profitpy
features.
- how are the (historical) data stored on the computer?
- can profitpy view or import other historical data, e.g. data
imported from yahoo?
- what does session_collector do?

Thanks for your help.

Christophe