E3D uses 12.1 databases. You can work in a same project with PDMS 12.1.SP2, PDMS 12.1.SP4 and E3D. But it is of course recommended to work with a unique version.
The PADD databases (DRAFT / DRAW) are the exception: once they are opened with E3D, they cannot be reopened with PDMS 12.1.
E3D uses 12.1 databases. You can work in a same project with PDMS 12.1.SP2, PDMS 12.1.SP4 and E3D. But it is of course recommended to work with a unique version.
The PADD databases (DRAFT / DRAW) are the exception: once they are opened with E3D, they cannot be reopened with PDMS 12.1.