mapserver-4.0.1 version source code documentation

[Akio Neuchi]

Hello,

I reported CGI interface trouble yesterday, as following:

----------------------------------------------------
The following message came from MapServer when a client was sending bunch of
node parametres by POST on the script.

...trying to POST /cgi-bin/mapserv, cgi_scan_headers
 reports: HTTP4044: the CGI program
/var/opt/SUNWappserver7/domains/domain1/server1/cgi-bin/mapserv
did not produce a valid header (program terminated without a valid CGI
header.
Check for core dump or other abnormal termination)
-----------------------------------------------

But now I am not sure whether the cause was at the phase of input or output.
Has anyone experienced the same problem?
And how can I get MapServer Error logs?

Thank you.

Akio Neuchi