[Gdal-dev] problem with gdalwarp

[Naiara Pinto]

Hello,

I am using gdal 1.2.6-1.3 and I am having a problem with gdalwarp. I
am trying to project a Modis layer from lat long to Lambert Azymuthal
Equal Area. Here is what I tried:

gdalwarp -s_srs '+proj=longlat +datum=WGS84 +ellps=sphere +no_defs'
-t_srs '+proj=laea +lat_0=45 +lon_0=-100 +ellps=sphere +x_0=0 +y_0=0
+units=m +no_defs' -rn -te -115 29 -101 42 -srcnodata 251 -dstnodata
-9999 LatLon.NA.2001.tree.tif perc_tree.tif

But I am getting the error message:
ERROR 1: geocentric transformation missing z or ellps
ERROR 1: GDALSuggestedWarpOutput() failed because the passed
transformer failed.

Does anyone have any ideas why this is hapenning?

Thanks,

Naiara.