M21 Crashes Host
Running Repetier firmware 0.92.3 on Arduino Mega, Repetier Host 1.5.5 on Windows 8.1 Pro. Connect to printer directly, Server stopped. Go to Manual Control tab and issue "M21" (no arguments) and click "send". Crashes Repetier Host every time. I'm trying to get SD card working, using Sainsmart 12864 LCD with integrated SD Card slot. Seem to be stuck in a loop in Host, firmware responds but very slowly.