PHP on NT Problem: "Resource id #1file opened.."

Folks, A client of mine (a Fortune 500 that sees PHP as a test case) has installed PHP on their brand-new NT4 box. I don't know (sorry, I can't get in touch with somebody who knows) what version, but I assume it to be 4.0.0, as it was just installed this week. A very simple program that we've written (forces the browser to download a text file as a TSF for use in Excel) isn't working on the new server. When the form data is submitted (a date range), the following is printed: ---- Resource id #1file opened.. Warning: Cannot add header information - headers already sent by (output started at F:\wwwroot\orders\index.php3:70) in F:\wwwroot\orders\index.php3 on line 100 Warning: Cannot add header information - headers already sent by (output started at F:\wwwroot\orders\index.php3:70) in F:\wwwroot\orders\index.php3 on line 101 ---- I'm certainly familiar with the warnings. It's "Resource id #1file opened.." that worries me. "#1file"? ".."? An error with typos in it has all the signs of a Microsoft error. I assume that the warnings are the result of this line being echoed. So the question is, what the heck is causing this error? (Or is it an error?) I've got an @ in front of the fopen, so that should shut it up, in case this is some weird idle remark being made by NT. I'm not quite sure of what to do, but the client wants an answer now. The obvious ("It's a Windows error, we can't help you") won't help them, and it won't help us. No matter what is causing the problem, they'll see it as a PHP problem, and we can't have that. Anybody have any ideas? I've run out of resources. Thanks, folks. Best, Waldo Waldo L. Jaquith < waldo@munkandphyber.com > < 804/979.2980 > // Munk & Phyber // 110B Second Street NE // Charlottesville, VA 22902