save {equations|variables|all} to <file>
The "save" command is used to write a snapshot of all or part of the current problem state to a specified "file".
One of the following keywords must be used to determine what will be saved:
equations - Save only the set of stored equations.
variables - Save only the set of evaluated variables and locks.
all - Save all stored equations, evaluated variables, and locks.
A save file can be "load"ed back into the program to restore the saved data.
e.g. save equations to test.eqn
save all to problem.tmp