Thanks for the response, Anon. One question for you - when in a position to not provide the original data you are working with... how, exactly, is one supposed to formulate a question?

I did what I thought was the best solution to this, which was to post up some working code, with an example of equivalent data, combined with an explanation of the symptoms I am seeing. The code snippet was kept the same as the original, aside from the lines I commented out (rather than simply deleting them, for visibility, in case there was an issue with the way those lines were being used).

Please tell me how I could have presented my question better/more clearly so that I can ensure I do so in future?

In reply to Re^2: How to avoid "Use of uninitialized value" with printf? by bobdabuilda
in thread How to avoid "Use of uninitialized value" with printf? by bobdabuilda

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