Hi, Tony. > "error: Unknown command" It's a Windows thing... Look for the line that reads: set CtrlFD [open "|$MD_MX_CTRL -s $MD_Socket -i" "r+"] (around line 441 of the script). Immediately after that line, put: fconfigure $CtrlFD -translation binary and give that a shot... *@#$*(&#$&*(#$ Windoze........ Regards, David.