Empty Fields in Array

Hello,

I have a question. I am trying to get just a single field in my array. But I am always getting an empty entry towards my target field. How does that come? And more important, can I remove that somehow?

Thanks for any reply.

Kind regards

Sam

WhileReadingRecords;
global stringvar array art;
global numbervar artcounter = 0;

if ({@le_Artikel_Nummer} = "SA11524") Then
    (artcounter := artcounter + 1;

    (redim art[artcounter];
    art[artcounter] := {@le_Artikel_Nummer}));