[mapguide-users] "Failed to read schema..." error with GDAL

[Kenneth Skovhede, GEOGRAF A/S]

Hi,

This might have been fixed in the newest version Maestro.
It was a problem with correctly parsing the schema xml.

Regards, Kenneth Skovhede, GEOGRAF A/S

On 16-12-2009 09:41, Hardt wrote:
> Hi Kenneth,
>
> I recreated the datasource and the layer, to be sure to have an error
> message before doing what you said.
>
> The error message popped out as always, but the "View last exception" option
> says there is no exception to view.
>
> http://n2.nabble.com/file/n4174355/Capture.png
>
>
> Kenneth Skovhede, GEOGRAF A/S wrote:
>    
>> Hi Hardt,
>>
>> In the "About..." menu, can you select the "view last exception",
>> and send the message to this list?
>>
>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>
>> On 14-12-2009 15:55, Hardt wrote:
>>      
>>> Hi,
>>>
>>> I created a raster datasource with GDAL.
>>>
>>> When I create a layer using this datasource, after I selected the Feature
>>> Resource, I get an error message saying
>>>
>>> "Failed read schema from data source.
>>> The operation gave the error message: Value cannot be null.
>>> Parameter name: input"
>>>
>>> http://n2.nabble.com/file/n4164488/Capture.png
>>>
>>> After that, I can select a schema (always default:default), and in the
>>> Raster field, sometimes I get "image", sometimes I get "raster" (it seems
>>> to
>>> depend on which editor I used when I created the datasource)
>>>
>>> I found no error in MG logs, and the DescribeSchema tool gives me this:
>>>
>>>
>>> <?xml version="1.0" encoding="UTF-8" ?>
>>> -<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
>>> targetNamespace="http://fdo.osgeo.org/schemas/feature/default"
>>> xmlns:fdo="http://fdo.osgeo.org/schemas"
>>> xmlns:gml="http://www.opengis.net/gml"
>>> xmlns:default="http://fdo.osgeo.org/schemas/feature/default"
>>> elementFormDefault="qualified" attributeFormDefault="unqualified">
>>> -<xs:element name="default" type="default:defaultType" abstract="false"
>>> substitutionGroup="gml:_Feature">
>>> -<xs:key name="defaultKey">
>>>     <xs:selector xpath=".//default" />
>>>     <xs:field xpath="FeatId" />
>>>     </xs:key>
>>>     </xs:element>
>>> -<xs:complexType name="defaultType" abstract="false">
>>> -<xs:complexContent>
>>> -<xs:extension base="fdo:ClassType">
>>> -<xs:sequence>
>>> -<xs:element name="FeatId">
>>> -<xs:simpleType>
>>> -<xs:restriction base="xs:string">
>>>     <xs:maxLength value="256" />
>>>     </xs:restriction>
>>>     </xs:simpleType>
>>>     </xs:element>
>>>     <xs:element name="Raster" type="fdo:RasterPropertyType"
>>> fdo:defaultImageXSize="1024" fdo:defaultImageYSize="1024" />
>>>     </xs:sequence>
>>>     </xs:extension>
>>>     </xs:complexContent>
>>>     </xs:complexType>
>>>     </xs:schema>
>>>
>>>
>>> I can use the layer in a map, but as I explained in another thread today,
>>> there are other problems with coordinate systems etc...
>>>
>>> What means the "schema" error, and how can I fix it?
>>>
>>> Thanks,
>>>
>>> Hardt
>>>
>>>        
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>>
>>      
>