Hi Martin,
I think with r39578 you want to prevent that topo, cidx and sidx is
written for a vector not in the current mapset, right? That makes
perfect sense. But if a vector is opened in update mode, the files coor,
hist, dbln, and head are also modified, not so when opened in read only
mode with Vect_open_old(). I think this update mode mainly targets the
coor file which is the most important file of a grass vector. You can
get a working vector after deleting and manually restoring all files but
the coor file. This one is the most precious one so to speak, and I
would modify the coor file only if really necessary. Therefore I would
suggest to open vectors in v.build with Vect_open_old(), but first make
sure that the vector is in the current mapset as is done in
Vect__open_old() with update requested. I know this is a bit against
current standard because it should be done by libraries only, but in
this case I would make an exception. What do you think?
Best,
Markus
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