Not easy replacement of Apache with Ngnix due to error log

[niraj]

Hi All

         I having the html files and cgi  files for that I was using the
apache, Its running fine. 

I heard about the Nginx and I was trying to setup the same in locally
first. but during that I was getting the error 


the error of Nginx not reflect the exact issue with the application. 

the error of Nginx is not system admin friendly at all.   from the below
error we are not able to conclude anything.

how to solve the such kind of issue by checking the error log ??????


2012/03/30 09:58:05 [error] 29619#0: *1 upstream closed prematurely
FastCGI stdout while reading response header from upstream, client:
192.168.1.44, server: localhost, request: "GET
/cgi-bin/baybuy_vendx/index.cgi?vendx_action=myoffice_commonuser&userid=53616c7465645f5f1fed4bcaa10a7da569ecb5a53e5a718a&page=1b662ecc4610f940ec530e3bc8762169&BusinessGrID=1
HTTP/1.1", upstream: "fastcgi://unix:/var/run/fcgiwrap.socket:", host:
"192.168.1.225:90", referrer:
"http://192.168.1.225:90/cgi-bin/baybuy_vendx/index.cgi?vendx_action=validate_both2"

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,224747,224747#msg-224747