Dear Monika,
Yes you can record and replay multiple transactions in one script/recording with eCATT.
Your experiences so far might be using the TCD command in CATT or eCATT tool. There unfortunatelly only on transaction is possible for one TCD command.
It even requires to finish the complete processing within this transaction (including DB save if intended), so no splitting into multiple eCATT commands is possible. The transactional context needs to be identical with the commands context block due to the use of batch input technoloy.
So how can you have multiple transactions automated in one recording?
The key is: use "SAPGUI" command here!
You should use the command SAPGUI for that, leveraging the SAP Gui scripting technology as automation API. This will automate the GUI just like a user would operate it, where "/n[TCODE]" in OK-Code field is an valid option.
Kind regards
Jens