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During the past weeks, I have tried QGIS to recognize SAGA via the processing toolbox, both being installed from the ubuntugis-unstable repository. I have tried this on several virtual ubuntu operating systems which I specifically set up for using QGIS. However, I always get the same "Missing dependency.This algorithm cannot be run" (sic) error message. Here's some more information:

  • I have tried (l)ubuntu 12.04, 13.04 and 13.10 (each 64bit), installing packages from the respective repos. I
  • I am now an ubuntu 12.04 32bit VM
  • I am well aware of this post, and yes, this workaround would do the trick! However, installing from the qgis repositories is not an option for me, as I also need the orfeo toolbox packages, which are not provided there :(
  • Package versions are qgis 2.2.0-1, saga 2.1.1 and python-saga 2.1.1. I had the same problem with the preceding QGIS version.
  • I checked the PATH variable and successfully launched saga_cmd, so everything seems to be in its place.

Any help is appreciated -- including first guesses on what may be the problem :)

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I suppose it could be possible to install QGIS like it was described in post you mentioned, and then install OTB from another repo or from source. –  SS_Rebelious Feb 24 at 11:03
    
I have this Problem as a recurring issue on my Ubuntu Precise with multiple users in multiple groups. In my case, the Problem is that /tmp/processing gets created by userA with ownership and no write Access outside the Group. If I fix the permissions on /tmp/processing with sudo chown root.root /tmp/processing and sudo chmod 0777 /tmp/processing, then saga (and grass) will work fine. Don't know if that's your Problem, though. –  MonsterMushroom Jun 12 at 9:33
    
Same problem here, no solution. –  user two seven two three nine Jun 17 at 1:11
    
Which algorithm are you trying to run? –  johanvdw Jul 3 at 19:53

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