Problem running gdal*.py in osgeo4w shell

[vascobnunes]

I'm trying to run gdal_calc.py (and other gdal*.py) from the Osgeo4w shell and can't do it cause I get this error:

C:\>gdal_calc
Traceback (most recent call last):
  File "C:\OSGeo4W\\bin\gdal_calc.py", line 47, in <module>
    import gdal
  File "C:\OSGeo4W\apps\Python27\lib\site-packages\gdal.py", line 2, in <module>
 
    from osgeo.gdal import deprecation_warn
  File "C:\OSGeo4W\apps\Python27\lib\site-packages\osgeo\__init__.py", line 21,
in <module>
    _gdal = swig_import_helper()
  File "C:\OSGeo4W\apps\Python27\lib\site-packages\osgeo\__init__.py", line 17,
in swig_import_helper
    _mod = imp.load_module('_gdal', fp, pathname, description)
ImportError: DLL load failed: The specified procedure could not be found.

[maphew]

It works for me at present. Perhaps your PATH environment isn't completely set, or there is something in it that shouldn't be (?)

From a fresh install of nothing but gdal-python and prerequisites, Start > Run > cmd then:

c:\>path=%windir%;%windir%\system32

c:\>c:\osgeo4w\OSGeo4W.bat

OSGEO4W home is c:\osgeo4w\

                   -={ OSGeo4W Shell Commands }=-

---8<---snip---

GDAL 1.9.1, released 2012/05/16

c:\>gdal_calc

gdal_calc.py [-A <filename>] [--A_band] [-B...-Z filename]  [--calc <calculation>]
 [--format] [--outfile output_file] [--type data_type] [--NoDataValue] [--overwrite]

c:\>

host system is Win7 Pro x64.