OK. I didn't realize how little experience you have writing scripts. When I saw that you were selecting specific pieces of the output of diff, I assumed you had more knowledge about shell programming than you seem to have.

I went back to your first message in this thread and looked at your script again. The immediate problem is that you are missing a closing quote on the line:

Code:

file2="ASML_LOGBOOK_2.TXT

Therefore, the value you assigned to the file2 variable is:

Code:

"ASML_LOGBOOK_2.TXT

diff ASML_LOGBOOK.TXT ${file2} |grep "

and ending up trying to read input from a file named:

Code:

 " > ${LOG_path}/LOG${toolnr}.TXT

with the name presumably being terminated by a " on a line you didn't show, or by your shell closing the string when it hit the end of file of your script.

If you just copied this code from another thread without understanding what you're doing, I strongly suggest that just replace what you showed us with the command:

Code:

diff ASML_LOGBOOK.TXT ASML_LOGBOOK_2.TXT

to see if the output is what you're expecting. If it is, then change it to:

Code:

diff ASML_LOGBOOK.TXT ASML_LOGBOOK_2.TXT > LOG1001.TXT

If it isn't what you want, read the diff(1) man page to see if there is an option that will give you what you want. If not, explain in detail what you really want in LOG1001.TXT and how that is different from what the diff utility produces by default.