[maplab-users] Errors with MrSID gdalplugin for ms4w1.0.1

[Ivan Kautter]

List serve subscribers,

First, please excuse posting this to multiple lists.  In attempting to use 
the MrSID gdalplugin, I am receiving these errors:

Warning: [MapServer Error]: msDrawMap(): Failed to draw layer named 
'100K_DRGs'. in C:\ms4w\apps\maplab-2.2\htdocs\mapedit\preview.php on line 
469

Warning: [MapServer Error]: msDrawRaster(): Unrecognized or unsupported 
image format in C:\ms4w\apps\maplab-2.2\htdocs\mapedit\preview.php on line 
469

Warning: [MapServer Error]: drawEPP(): EPPL7 support is not available. in 
C:\ms4w\apps\maplab-2.2\htdocs\mapedit\preview.php on line 469

Warning: [MapServer Error]: msInsertHashTable: Invalid hash table or key in 
C:\ms4w\apps\maplab-2.2\htdocs\mapedit\preview.php on line 469

..........same error for multiple lines

Warning: [MapServer Error]: msInsertHashTable: Invalid hash table or key in 
C:\ms4w\apps\maplab-2.2\htdocs\mapedit\preview.php on line 469

Fatal error: Call to a member function on a non-object in 
C:\ms4w\apps\maplab-2.2\htdocs\mapedit\preview.php on line 474


To specify the environment in which I am attempting to use the plugin , it 
is being run under ms4w 1.0.1, maplab2.2, phpmapscript4.4, Windows XP home.

MrSID files are being accessed from a shapefile that is acting as a 
tileindex for 45 DRG Topos for state of California.  Image Path in the 
shapefile is defined relative to position of the map file.

http.conf has been altered to include these lines:

SetEnv GDAL_DATA "/ms4w/gdaldata"
#SetEnv GDAL_DATA "/ms4w/tools/ogr-utils"
SetEnv GDAL_DRIVER_PATH "/ms4w"

Required plugin dll and LizardTech dll are in the correct locations.

The second error is confusing in that it says an unsupported format, but my 
impression was that the plugin was intended to circumvent re-building the 
gdal dlls to support MrSID, so if the plugin were performing its function 
such an error should not be possible.  Perhaps I am mistaken.

It seems there could be any number of problems here, but I am hoping someone 
has some experience using this plugin that may have some suggestion for me.

Thanks for your time and efforts.

Ivan Kautter