Trying to perform mapproxy-seed but always get an error:<div><br></div><div><div>$ mapproxy-seed -f mapproxy_ex1.yaml -s seed.yaml --seed myseed1</div><div>========== Seeding tasks ==========</div><div>Start seeding process (1 task)</div>
<div> myseed1:</div><div> Seeding cache 'ex1_cache' with grid 'gridmerc' in EPSG:3857</div><div> Limited to: 29.50890, 59.67680, 30.72040, 60.22010 (EPSG:4326)</div><div> Levels: [0, 1, 2, 3, 4, 5]</div>
<div> Overwriting: no tiles</div><div>[09:27:12] 0 0.00% 3284915.72187, 8328129.84247, 3419779.28497, 8448904.60111 (0 tiles) ETA: N/A</div><div>[09:27:12] 1 0.00% 3284915.72187, 8328129.84247, 3419779.28497, 8448904.60111 (0 tiles) ETA: N/A</div>
<div>[09:27:12] 2 0.00% 3284915.72187, 8328129.84247, 3419779.28497, 8448904.60111 (0 tiles) ETA: N/A</div><div>[09:27:12] 3 0.00% 3284915.72187, 8328129.84247, 3419779.28497, 8448904.60111 (0 tiles) ETA: N/A</div><div>
[09:27:12] 4 0.00% 3284915.72187, 8328129.84247, 3419779.28497, 8448904.60111 (0 tiles) ETA: N/A</div><div>[09:27:12] 0 100.00% 3284915.72187, 8328129.84247, 3419779.28497, 8448904.60111 (32 tiles) ETA: 2013-02-02-09:27:12</div>
<div>[2013-02-02 09:27:13,044] mapproxy.source.wms - WARNING - expected image response, got: <?xml version='1.0' encoding="utf-8" standalone="no" ?></div><div><!DOCTYPE ServiceExceptionReport SYSTEM "<a href="http://schemas.opengis.net/wms/1.1.1/exception_1_1_1.dtd">http://schemas.opengis.net/wms/1.1.1/exception_1_1_1.dtd</a>"></div>
<div><ServiceExceptionReport version="1.1.1"></div><div><ServiceException></div><div>msDrawMap(): Image handling error. Unable to initialize image.</div><div>msCalculateScale(): General error message. Invalid image extent, minx=-nan, miny=-nan, maxx=-nan, maxy=-nan.</div>
<div></ServiceException></div><div></ServiceExceptionReport></div><div><br></div><div>An error occured. Retry in 2 seconds: SourceError('no image returned from source WMS',)</div></div><div><br></div><div>
In Apache log:</div><div><br></div><div><div>::1 - - [02/Feb/2013:09:27:15 +0400] "GET /cgi-bin/ows?styles=&format=image%2Fpng&height=1&bbox=3284915.72187,8328129.84247,3419779.28497,8448904.60111&transparent=True&layers=water&service=WMS&width=2&request=GetMap&srs=EPSG%3A3857&version=1.1.1 HTTP/1.1" 200 638 "-" "MapProxy-1.6.0a-20130202"</div>
</div><div><br></div><div>Strange values of width and height - very small, why not 256x256?</div><div><br></div>