Tom45,

The terminology associated with matrix solutions (i.e. [K]{x}={f}) typically refers to the stiffness matrix [K], the load vector {f}, and the displacement vector {x}.

When you have multiple load cases, you have multiple load vectors, i.e. {f1, f2, f3, ...}, which correspond to multiple displacement vectors i.e. {x1, x2, x3, ...}. Now, what you put in each load vector is up to you. However, to keep ones sanity most people would put T1, P1, D1, F1, U1 and so forth in "f1". Then T2, P2 and so forth in "f2", and so on. Of course this idea falls apart in more complex systems, especially when occasional loads are considered.

CAESAR II doesn't care, the software does not force any particular convention. There is no rule that says T1 must go along with P1 - that is determined by your system. This is why it is a good idea to use the "load case name" option.