Thank you for the information and suggestions. It's a bit complicated but I found myself doing lots of coding without expecting to and nobody has the time to explain stuff because, of course, they have their own work to do and can't really give me any more time than they already have. The tricky bit is that the (indeed huge) help I received was just me being a backseat coder - which although it helped tremendously in terms of the project progressing, it couldn't do much in terms of me actually learning to code. I did learn to avoid syntax errors, I did learn to do some things, I can write some stuff but I lack proper knowledge and it's not possible to get more support at this stage. All I can do is google and ask questions - and produce dubious code, unfortunately.

Anyway. No, I didn't realise I was looping through a single value. I was under the impression (or at least hoping) that I was looping through all values of the last column. And this is where disappointment and tiredness kicks in - I've been "refining" (lol) a piece of code for 10 straight hours and in the end it's completely wrong and doing something weird - and I don't even know what it's doing if it's looping through a single value! In any case thank you very much for the contributions, time and patience.

In reply to Re^6: divide multi-column input file into sub-files depending on specific column's value by angela2
in thread divide multi-column input file into sub-files depending on specific column's value by angela2

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