[OSM-newbies] Osmarender with bounds

[Max Moritz Sievers]

Hi,

I want to render a map of Darmstadt City (Germany). 

I downloaded the information with:
wget 
http://www.openstreetmap.org/api/0.4/map?bbox=8.616490,49.842924,8.689490,49.897924

and insterted in the renamed file data.osm after the line:
<osm version="0.4" generator="OpenStreetMap server">

the following:
 <bounds
   minlat="49.842924"
   minlon="8.616490"
   maxlat="49.897924"
   maxlon="8.689490" />

Then I executed:
xmlstarlet tr osmarender.xsl osm-map-features-z17.xml > map.svg

and:
inkscape -D -w 746 -e output.png map.svg

This command produces several times:
** (inkscape:7138): CRITICAL **: void 
gnome_canvas_bpath_def_closepath(GnomeCanvasBpathDef*): assertion 
`bpd->moveto_idx >= 0' failed

and ends with:
Background RRGGBBAA: ffffff00
Area -212,597:1017,11:21,0596:1059,96 exported to 746 x 137 pixels (287,345 
dpi)
Bitmap saved as: output.png

The 137 pixels height are only for the logo. There is no map.

Then I tried:
mms at dbs:~/gps/DA$ inkscape -C -w 746 -e output.png map.svg

Now the error messages read as:
** (inkscape:7157): CRITICAL **: void 
gnome_canvas_bpath_def_closepath(GnomeCanvasBpathDef*): assertion 
`bpd->moveto_idx >= 0' failed

and end with:
Background RRGGBBAA: ffffff00
Area 0:0:744,094:1052,36 exported to 746 x 1055 pixels (90,2305 dpi)
Bitmap saved as: output.png

1055 pixels height could be correct. But the image is solely black.

What do I do wrong? Any suggestions?

-- 
regards
Max Moritz Sievers