Readme - Digital MMC SD R0400.ZIP --------------------------------- Description: ERROR: Communication failure if p-gain is set to zero. PRODUCT: R0400 Digital MMC Smart Drive Firmware replacement for PiCPro V15.1. FIX: Download and unzip .hex file. Replace file of same name under C:\Program Files\G&L Motion Control\PiCPro V15.1 Professional Edition\Firmware\Digital MMC Smart Drive Released 11/16/2005, 67 KB