Enabling ArcSDE crashes MapServer

[Thy, Kristian]

I have installed the MS4W package on a Windows XP Pro box. We have
tested and can succesfully display data from local shapefiles. But when
I want to enable SDE connection support as per
http://www.maptools.org/ms4w/index.phtml?page=README_INSTALL.html#sde-9-1
the new libmap.dll apparently makes mapserv.exe crash - I see a 500
Server Error in the browser. Here's all I get in the Apache log:

	[Thu Aug 03 16:00:15 2006] [error] [client 127.0.0.1]
		Premature end of script headers: mapserv.exe, 
		referer: http://localhost:8080/krak/

The log file for the application itself is empty. Using the original
libmap.dll, I have verified that the .map file is syntactically valid
(but nothing is displayed, of course, since it's using SDE connected
layers).

Looking at mapserv.exe and libmap.dll in the Dependency Walker
distributed with Visual Studio, I see absolutely no difference between
using one or the other libmap.dll except that SDE91.dll is found and
correctly linked with the SDE-enabled dll.

Any ideas?

Thanks in advance,
Kristian

-- 
Kristian Thy
GIS Developer
Atkins Danmark 
Transport, Miljø og GIS 
Arne Jacobsens Allé 17 
2300 København S 
tel: (+45) 8233 9366


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