I used Radiance 5.0 Ver ( OS fedora)
Radiance run
<process>
!/bin/sh
P40_Paju
oconv -r 10240 Paju_0417.sky Room.rad Prism_P40_10.rad > P40_Paju.oct mkpmap -apg P40_Paju.gpm 5000 -t 30 \ -apc P40_Paju.cpm 50000 P40_Paju.oct
rpict -ab 3 -aa .2 -ar 128 -ad 512 -dr 3 -dp 512 -t 10 \ -ap P40_Paju.gpm 100 \ -ap P40_Paju.cpm 500 \ -vf view_Paju.view \ -ro P40_1230.pic P40_Paju.oct
rtrace -w -h -I+ -ab 3 -aa .2 -ar 128 -ad 512 -dr 3 -dp 512 \ -ap P40_Paju.gpm 100 \ -ap P40_Paju.cpm 500 P40_Paju.oct < luxCalcPos.inp | rcalc -e "$1=179($10.265+$20.670+$30.065)" > P40_1230.dat
pcond -h P40_1230.pic > P40_1230.h.pic ra_t16 -3 P40_1230.h.pic > P40_1230.h.tga
<result> =179(0.265+0.670+0.065) ^ illegal variable name rtrace : signal - Broken pipe
why Result ?