Hi Guys Just tried to run average –v input1.ti3 input2.ti3 output.ti3 (yes corresponding files were renamed to make it easer) and I got error: average: Error - CGATS file 'ûv' read error : Unable to open file 'ûv' for reading First time it happened usually it worked. Can any one tell me what did I forget about? Thats my steps till now targen -v -d2 -G -g128 -f1932 3880Pro-Photo-Luster printtarg -v -ii1 -a1.05 -T360 -C -b -m1 -M1 -P -pA4 3880Pro-Photo-Luster chartread -v -H -L 3880Pro-Photo-Luster (- rename to input1) chartread -v -H -L 3880Pro-Photo-Luster (- rename to input2) average –v input1.ti3 input2.ti3 output.ti3 -- t.danus@xxxxxxxxx Skype: Ithilstone