Sed issue in K Shell programming

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# 1  
Old 02-25-2008
Sed issue in K Shell programming

I am doing the following script in k shell

sed -i 's/FILENAME/$i/g' TEST/test$j.ctl > TEST/control$j.ctl

In the file it replaces $i for all FILENAME, it doesnot replace with the value of i. I put single quotes like below

sed -i 's/FILENAME/'$i'/g' TEST/test$j.ctl > TEST/control$j.ctl

I get following error

sed: -e expression #1, char 13: Unknown option to `s'

I did following

sed 's/FILENAME/'$i'/g' TEST/test$j.ctl > TEST/control$j.ctl
same error and it created 0 bytes control$j.ctl

Please help..
# 2  
Old 02-25-2008
Simply use double quotes instead of single quotes:

sed -i "s/FILENAME/$i/g" TEST/test$j.ctl > TEST/control$j.ctl

Single quotes prevents variable expansion.
# 3  
Old 02-25-2008
Nope same error

sed: -e expression #1, char 14: Unknown option to `s'

sed -i "s/FILENAME/$i/g" TEST/test$j.ctl > TEST/control$j.ctl

sed -i "s/FILENAME/'$i'/g" TEST/test$j.ctl > TEST/control$j.ctl

Tried both but same error

using #!/bin/ksh shell
# 4  
Old 02-25-2008
Oh sorry. Now I don't have ksh available for testing and, to be honest, I don't use it often and don't know it very well.
But it seems strange to me that a basic variable expansion doesn't work in ksh like in bash or sh Smilie
# 5  
Old 02-25-2008

Please check the following syntax and let me know it is correct or not

sed 's/FILENAME/'${i}'/ig' filename >filename1


sed "s/FILENAME/'${i}'/ig" TEST/test$j.ctl > TEST/control$j.ctl
# 6  
Old 02-25-2008
robotronic's answer works.
Is that the only line you have in the script?
# 7  
Old 02-25-2008
nope it did not work
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