grass vector files

[James McManus]

I am trying to open a GRASS vector file with mapserver, using the 
following sequence in my .map file:

NAME "roads"
     TYPE line
     STATUS on
     CONNECTIONTYPE OGR
     CONNECTION 
"/var/www/html/mapserver/grassdata/MDI/PERMANENT/vector/roads/head"
     DATA "1" # Layer number
     CLASS
         NAME "roads"
         COLOR 250 100 0
     END

When I try to initialize nothing appears in my web browser. I get a slew 
of error messages in my httpd erro_log file, beginning with the line:

 No such file or directory: Cannot open drivers directory, referer: 
http://www.aratasystems.com/mapserver/MDI_i.html

This sounds a problem with accessing the file through my server. 
However, I am able to open a GRASS raster file in, with directory and 
files settings that are the same as the GRASS vector file. The next line 
in the error_log has the following statement:

*** glibc detected *** /var/www/cgi-bin/mapserv: free(): invalid 
pointer: 0x00000000007fc540 ***

This lead me (probably incorrectly) to think it may have to do with how 
I am compiling mapserver. I have tried recompiling mapserver in a 
variety of ways without success. Has anybody out there run into this 
problem before? Any hints would help!

Jim