Thanks for the response. In the past I'd send debug data out a serial port, but I'm working on a custom board without one. However you just made me remember the stats option that I can view with a debugger.
Your fork sounds interesting. I probably won't use it on this device since it's been proven as-is, but am always looking for anything better.
From: Sergio R. Caprile <address@hidden> To: address@hidden Sent: Monday, December 21, 2015 6:12 AM Subject: Re: [lwip-users] httpd CGI parameter length
You seem to be running out of memory, not enough buffer space to hold the data. Try enabling stats and logging to get a clue, or use the good old breakpoint and single-step.