You can use the Saga dissolve (via processing toolbox). It is faster then
QGIS's but I think they are working on a solution for that.
Nicolas Cadieux M.Sc.
Les Entreprises Archéotec inc. 
8548, rue Saint-Denis Montréal H2P 2H2
Téléphone: 514.381.5112  Fax: 514.381.4995
www.archeotec.ca
On Sep 21, 2015 05:28, "Lene Fischer [via OSGeo.org]"
<[email protected]> wrote:
I have reported a bug https://hub.qgis.org/issues/13167 It´s still
open...
Regards
Lene Fischer
-----Oprindelig meddelelse-----
Fra: [hidden email] [mailto: [hidden email] ] På vegne af Julie Pierson
Sendt: 21. september 2015 10:43
Til: [hidden email]
Emne: [Qgis-user] Geoprocessing dissolve tool
Hi all,
I tried using the dissolve tool from the QGIS geoprocessing tools and all
features get dissolved together, resulting in only one feature, regardless of
the dissolve field. I tried with several datasets. Do you have the same problem
or is it only me ? I've used this tool in the past, and it worked ok.
Thanks for your help !
Julie.
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