Sounds like you've now got duplicate mapnik libraries installed (or partially installed).

The Mapnik python bindings automatically (at compile time) get installed with a knowledge of where the postgis plugin lives. Under normal circumstances this is:

/usr/local/lib/mapnik/input/postgis.input

If you have that file things are installed correctly. But if you are running a different version of Python than you installed with originally then another version of Mapnik's python bindings might be on your PYTHONPATH that does not know about that location...

Tracking down duplicate installs should fix this.

Dane


On Mar 9, 2010, at 2:08 AM, Dom Lehr wrote:

Hello,

I m starting to feel a lil stupid... Anyways, when I try to run generate_tiles.py, I get :

[r...@hanosm1 mapnik_app]# python2.5 generate_tiles.py
render_tiles( (8.4813576818000005, 53.0103701114, 8.9830477728000009, 53.606166416400001) /opt/mapnik_app/osm.xml /opt/ geodata/ 0 5 Bremen )
Traceback (most recent call last):
  File "generate_tiles.py", line 210, in <module>
    render_tiles(bbox, mapfile, tile_dir, 0, 5, "Bremen")
  File "generate_tiles.py", line 129, in render_tiles
renderer = RenderThread(tile_dir, mapfile, queue, printLock, maxZoom)
  File "generate_tiles.py", line 59, in __init__
    mapnik.load_map(self.m, mapfile, True)
RuntimeError: Could not create datasource. No plugin found for type 'postgis' (encountered during parsing of layer 'leisure')

I installed postgres 8.3 using postgresql-8.3.9-1-linux-x64.bin PostGIS using edb_postgis_1_3_5_pg83.bin. I also installed the matching libraries:
[r...@hanosm1 PostGIS]# rpm -qa | grep postg
postgresql-8.3.9-1PGDG.rhel5
postgresql-devel-8.3.9-1PGDG.rhel5
postgresql-libs-8.3.9-1PGDG.rhel5
postgresql-server-8.3.9-1PGDG.rhel5

Does anyone have an idea?

Thanks a lot!

Dom
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