[mapserver-users] msProcessProjection(): Projection library error. no system list, errno: 13

[Adrian Popa]

Update:

I have symlinked the null file to epsg, and now strace shows that the 
file is read, but I still get the same error when trying to call WMS 
GetMap... :(

[root at terra map]# ls -l /usr/share/proj/null
lrwxrwxrwx 1 root root 20 Oct 13 10:50 /usr/share/proj/null -> 
/usr/share/proj/epsg


Adrian Popa wrote:
> Thank you for your reply Lars, my info is inline.
>
> Lars Lingner wrote:
>> Adrian Popa schrieb:
>>   
>>> Hmm, any idea on this one? How can I find out if proj is trying to read
>>> the epsg file? I'm thinking of using strace to see what files it tries
>>> to open, but I don't know what syntax to use to try to project from 4326
>>> to 900913...
>>>
>>>     
>>
>>
>> Just to clarify:
>>
>> - Your data is in wgs84 (epsg:4326)
>>   
> Yes
>> - you want to serve mercator projection (epsg:900913)
>>   
> Yes (the frontend will be OpenLayers (through TileCache)
>> A few questions:
>>
>> - are there any errors in the capabilities document?
>>   
> No, it looks ok. I can post it if you want, but it's a bit large. It 
> outputs an XML which describes the layers, projections and some 
> settings from the map file. I haven't seen another working 
> GetCapabilites file, so I can't tell if it's missing something...
>> - did you tried to use mapserver logging (MS_ERRORFILE) and high debug
>> level (DEBUG 5)
>>   
> Here is the output after enabling MS_ERRORFILE and DEBUG 5 at layer 
> level and at map level:
> [Tue Oct 13 10:36:36 2009].954434 msProcessProjection(): Projection 
> library error. no system list, errno: 13
>
> [Tue Oct 13 10:36:36 2009].954562 mapserv request processing time 
> (msLoadMap not incl.): 0.000s
> [Tue Oct 13 10:36:36 2009].954584 msFreeMap(): freeing map at 0x8496ac8.
> [Tue Oct 13 10:36:36 2009].954651 freeLayer(): freeing layer at 0x84a9378.
>> - could you try to use shp2img, maybe this gives you a bit more information?
>>   
> [root at terra map]# shp2img -o /tmp/out.png -m 
> /var/www/html/map/rtc_base.map -e "20.259999999999998 43.16 
> 29.700000000000003 49.2016" -s "1250 800" -l "GranitaJudete"
> This works just fine (however it doesn't use WMS!). The image 
> displayed is correct (and it is projected in mercator projection!).
>
> If I run:
> [root at terra map]# strace shp2img -o /tmp/out.png -m 
> /var/www/html/map/rtc_base.map -e "20.259999999999998 43.16 
> 29.700000000000003 49.2016" -s "1250 800" -l "GranitaJudete" 2>&1 | 
> grep epsg
> .. I don't get any matches on the epsg file that is supposed to be 
> used by proj.
> Looking through the output of strace, I can see it tries to open some 
> proj-related files...
> open("/usr/share/proj/proj_def.dat", O_RDONLY) = -1 ENOENT (No such 
> file or directory)
> open("/usr/share/proj/null", O_RDONLY)  = -1 ENOENT (No such file or 
> directory)
>
> I wonder why it tries to open a file called null - maybe an error?
>> - did you compile MapServer and the dependencies by yourself?
>>   
> Yes. These are my configure arguments:
> ./configure --with-freetype --with-png --with-agg=../agg-2.5 
> --with-proj --with-ogr --with-gdal --with-xml2 --with-wfs --with-wcs \
> --with-wmsclient --with-wfsclient --with-postgis --with-threads 
> --with-sos --with-mygis --with-geos --with-tiff
>> - what MapServer version do you use?
>>   
> version 5.4.1
>> - do you have Proj4 installed? (OpenLayers doesn't use the same lib, it
>> uses the javascript lib)
>>   
> [adrianp at terra mapserver]$ rpm -qa | grep proj
> proj-devel-4.5.0-1.fc5
> proj-4.5.0-1.fc5
>
>> I hope it does not look like keeping you busy, but without further
>> information its difficult to help.
>>
>>   
> Your help is very much appreciated. Any idea is a good one because it 
> might get me out of this predicament. :)
> Regards,
> Adrian
>
> P.S. If I understand how projections work - if I "call" the projection 
> with it's EPSG code it needs the epsg file to get the details about 
> the projection. In my layers I'm using the EPSG definition instead the 
> EPSG code to define my projections. If I switch to codes it won't work 
> (I have tried a few months ago). So, to me, it seems mapserver (or 
> proj) can't get the definitions from the epsg file (maybe because it 
> searches for the wrong file). I will try to create the file and try 
> again. I'll let you know how it works.
>> Lars
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>>
>>   
>
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