Readme - Digital MMC SD R0400-2.ZIP Description: ERROR: Communication failure if p-gain is set to zero OR Feedback type ENDAT will not maintain absolute position value through a power cycle. 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 01/12/2006, 67 KB