Niklas81

Thx, but as u can see, i have wire a false constant (LV 2010 constant) into the "prepend array or string size". U gut right. The original excel file whas a .xlsx so if a give the copy the extension of .xlsx it wors fine. Thx for all help.

tanks for the help. Im usung excel 2003. and there is no error in the read segment. The excel progran is not open when I run this vi. and if a save the data arr from the origial .xls file in another array controll and then read the coppy .xls file as binary and compere those data arrays it is identical. And as i wrote, this vi work whit anny ather file except .xls

Hi! I try to make a copy of a excel file by "Read from Binary File" and then save the binary array whit "Write to Binary File". But the copy file is corrupt.. Its works whith image files, and if I make a .rar file of the excel file and the copy it works...? This is just a labb now, but the goal is to send the .xls file over RS232 to anoter computer. Thans for anny healp. sorry for my bad english =/