* Check the following: Is sol_u a vector that has ghost elements before
serialization? Is sol_u a vector that has ghost elements after
serialization? Because if these vectors don't have ghost elements, then
what you see visually may not be what you actually have.
The vectors used for the serialization and deserialization are of the same
type and the output
of the vector should be correct because is the same routine that I usually use
to visualize
the the solution.
That's the part about debugging: of course "the vector *should be correct*",
except that it isn't :-) Debugging is all about finding the discrepancies
between what "should be true" and what "is true". When I debug problems, I try
to find exactly these sorts of discrepancies and then find a wedge to go
backwards by asking "ok, I thought that this *should* be true, but it
apparently isn't; why did I think this to be true, i.e., what previous state
is something computed from and what do I know about this previous state that
*should also be true*?" Then I go check the correctness of that previous state
that I thought should be true and compare with reality.
In your case, I would verify that indeed the vectors both before and after
serialization really have ghost elements and that these ghost elements have
the correct values. You should really be able to reproduce all of this on a
very coarse mesh (maybe just two cells) for which you can output everything to
screen, or see it in a debugger.
Best
W.
--
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Wolfgang Bangerth email: [email protected]
www: http://www.math.colostate.edu/~bangerth/
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