In the structure mass checks, the only included mass is that which comes from:

Any other mass (for example, due to Layered Sections or Command objects that define additional mass elements directly in APDL) will not be included. This may mean that the center of gravity about which rotational accelerations are applied is incorrect.

It is not possible to map loads onto Line Bodies from a Hydrodynamic Diffraction analysis that includes multiple structures.

When the imported Geometry includes Line Bodies, it is not possible to map hydrodynamic loads onto Cross Sections of Type: ASEC (arbitrary) or MESH (user-defined mesh).

Line Bodies of Model Type: Link (element type LINK167) are not currently supported.

Where the Pressure Mapping method is set to Interpolated, you are limited to less than five million mesh nodes.

When an internal Line Body is used to model the viscous drag acting on part of a structure, and that part of the structure is also modelled by diffracting panels, the wave particle kinematics around the Line Body will include the diffracted wave effects due to that part of the structure.

It is not possible to map loads from a frequency domain Hydrodynamic Response system (stability analysis or frequency statistical analysis).

Apart from cable forces, tether forces/moments and joint forces/moments, which can be mapped using the Cable Force, Tether Force, and Joint Force objects, and Morison loads on Line Bodies or disc elements, the structure selected for time domain Hydrodynamic Response pressure mapping must not include features which will induce additional forces or moments on the structure, such as buoyancy elements, fenders, thrusters, or other viscous drag effects.

Pressure mapping cannot be performed for hydrodynamic models that include Moonpools.