Splitting a file using AWK on Mac OS X

Question

I am trying to split a file using AWK on a specific delimiter. The awk code is as follows:

awk '/SEPARATOR/{n++}{print > "part" n ".txt" }' in.txt

this code works fine on my linux systems. But when I run the exact same code on Mac OS X, I get the following error:

awk: syntax error at source line 1
 context is
    /SEPARATOR/{n++}{print > "part" >>>  n <<<  ".txt" }
awk: illegal statement at source line 1

I guess this is some kind of difference between the awk that comes with OS X and mawk from Linux. Removing the string concatenation in the printout causes the awk program to work on both platforms, but I would prefer to keep the prefix and surfix. How to write an awk program that splits a file on a separator into several numbered parts and works on both platforms?

Answer 1

script :

awk '/SEPARATOR/{n++}{filename = "part" n ".txt"; print >filename }' in.txt