In the Work plan section of an RSP without infrastructure, I have included 3 software activity groups in the application, but the system still does not allow me to include other packages than the communication and management package (the fourth one). In the manual it says that we can have maximum 6 activity groups. Is this an error or a misunderstanding?

For Regular projects without infrastructure a maximum of 3 soft activity groups and one for management and communication are possible (4 activity groups in total).