At a glance (without seing your gedcoms), FamilyTreeMaker or Ancestry are generating a wrong/empty/exotic ID on family identifiants.
Maybe Gramps knows this products did such of thing and Gramps tries to fix it?
It is just my guess, because it is easy to corrupt a gedcom (planned or not!), see http://www.gramps-project.org/bugs/view.php?id=2710
My though is that something is corrupted on FAMC level (some IDs)
Sorry, but why not using CSV or ODS file formats ?
Gedcom file format does not provide additionnal support and can be easily corrupted.
Maybe you can also try third party tools using Gramps XML as 'data engine/model' ! See: http://members.tele2.nl/m.d.nauta/grampsExhibit/KootExhibit.xml under Android devices ...
--- En date de : Dim 26.2.12, Dianne Reuby <pramclub@...> a écrit :
> De: Dianne Reuby <pramclub@...>
> Objet: Re: [Gramps-users] Corrupt gedcom (was GEDCOM viewer for Android)
> À: gramps-users@...
> Date: Dimanche 26 février 2012, 16h45
> On Sun, 2012-02-26 at 16:44 +1100,
> Martin Steer wrote:
> > Just to be clear, inside Gramps your father's not
> married to your
> > husband's ancestor. However, when you export your
> family tree to gedcom
> > he is. And if you import this gedcom into Gramps he is.
> Is that right?
> > Does the gedcom look okay as text? In particular, as it
> relates to your
> > father?
> I've been comparing it with various sample gedcoms I've
> found online,
> but I can't see any obvious differences. But I've never
> really looked at
> them before.
> > Have you tried a minimal example? E.g. by creating a
> new family tree
> > with a simple family, then exporting from Gramps to
> gedcom, etc.
> I've had some strange results. I did my daughters ancestors,
> twice -
> both times it only includes her fathers line, not mine.
> I did my paternal great-grandfathers descendants, and it
> shows no
> spouses, and parent unknown if the parent is the one not
> from his birth
> line (but I imagine this is correct, as those people
> *aren't* his
> descendants, they married his descendants).
> I've tried creating a new tree with sample families, and
> don't seem to
> find any problems. But I haven't tried to create a very
> large tree -
> only one family, with a few people.
> > Do you have a testing copy of your Gramps db? You could
> make one by
> > exporting to e.g. Gramps xml then importing into a new
> family tree. What
> > happens if you make such a tree, but filter out all but
> your father and
> > his descendants?
> > Are there other connections between your husband's
> family and yours?
> > What happens if you filter out your husband's line?
> This seems to be a bit random - surnames disappear, although
> they show
> OK in gramps. Relationships change, and when I generate a
> gedcom they
> errors change. For example in run 1 Person A is incorrectly
> married to
> Person B. On a second run, Person A is incorrectly married
> to person C.
> But in gramps they show perfectly OK on the database, just
> incorrect if
> I load the gedcom.
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