but where do I look?

In the apache error log. If there's nothing there, start peppering your script with debugging statements until you track it down.

Also look in the apache access log which will show the total size of the response body. It may be the case that the web server is sending the data fine, but something else in the network (or on the Windows box itself) is cutting it off.

In reply to Re^3: csv file download size limits? by hippo
in thread csv file download size limits? by ted.byers

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