python - Cannot get arcpy.MosiacToNewRaster to work with list

Below I have a snippet of a much larger code that I cannot get to work and I am not sure why. It seems that I always have trouble using arcpy functions with rasters. Can anyone help me get this code to work? Thanks!

outpath = 'G:\\PROJECTS\\Cedar\\Environmental\\FEMA\\Results\\Processing.gdb'
arcpy.env.workspace = outpath

# List the relative elevation rasters in gdb and Mosiac
rasters = arcpy.ListRasters('Rel_elv*')
arcpy.MosaicToNewRaster_management(rasters, outpath, 'Relative')

I have tried all sorts of different ways to do this and the mosiac to new raster function does not seem to like my list.

Answer

I figured out what the problem was...I did not read the tool help too closely the first time. It was not working because the number of bands was not an optional parameter. Once I filled it in my original code worked.

This worked:

    outpath = 'G:\\PROJECTS\\Cedar\\Environmental\\FEMA\\Results\\Processing.gdb'
arcpy.env.workspace = outpath

# List the relative elevation rasters in gdb and Mosiac
rasters = arcpy.ListRasters('Rel_elv*')
rcpy.MosaicToNewRaster_management(rasters, outpath, "Relative",
                                                  "", "32_BIT_FLOAT", "", 1, "LAST","FIRST")