nawk won't accept comma as delimiter

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# 1  
Old 02-08-2012
nawk won't accept comma as delimiter

I have a text file delimited by commas, with three fields (no " marks).

I want to use awk to create a fourth field which is equal to the line number + field 1 + .txt

I've searched this forum and found the following
nawk -v OFS=';' '{print $0, FNR}' myFile

Which I've amended to change the ; to a , - and it works simply to append the line number at the end.

But when I amend it to the following, it won't accept that the commas is a delimeter and still thinks it should be a space;
nawk -v OFS=',' '{print $0, FNR "_" $1 ".txt"}' myFile

Field 2 has spaces, and it thinking that 1 is the whole of field 1 and the comma up to the first space in field 2.

Help! How can I get this awk to recognise that the comma is the delimter?

---------- Post updated at 01:03 PM ---------- Previous update was at 12:58 PM ----------

I've sorted this by amending OFS to FS - not sure what the difference is but it seemed to work

Last edited by Franklin52; 02-08-2012 at 10:28 AM.. Reason: Please use code tags for code and data samples, thank you
# 2  
Old 02-08-2012
try this
nawk -v OFS="\," '{print $0, FNR "_" $1 ".txt"}' myfile

Last edited by Franklin52; 02-08-2012 at 10:28 AM.. Reason: Please use code tags for code and data samples, thank you
# 3  
Old 02-08-2012
FS=input field selector
OFS=output field selector
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