How can I save the optimal values of a certain variable X that appears in one model, and reuse in another model that is otherwise unrelated, i.e. the save/restart facilities are not appropriate.
Write the level and the marginals of the variables you are interested in into a GDX container and load that GDX container into your second model.
At the end of the first model add something like (assuming that you are interested in x):
execute_unload 'results.gdx', x; and load this data into your second model before the solve statement:
execute_loadpoint 'results.gdx', x;
Another approach is to use the savePoint option. Just add a line
option savePoint=1; or
option savePoint=2; to your first model before the solve statement. In your second model add the line