Attach to an open session with CBTA

Hello,

during my investigations on CBTA there is one point where I could need some assistance or a hint.

In my application under test are some transactions where the underlying business scenarios are very complex. To increase the maintainability I would like to split up these test script to several less complex sub-steps. During my work with eCATT I got used to the SAP GUI (Attach) command to record an transaction in several steps.

My current impression is that it isn't possible to attach to an open session with CBTA and that I always have to start with an new transaction in an new session. Is this right and if yes how can I make sure to keep the maintainability of my test scripts?

Thanks in advance and best regards,

Christoph Menke