A computer glitch last week left between 2,000 and 3,000 Iowa customers of Magna Group Inc. with useless teller machine and debit cards.

St. Louis-based Magna, which entered Iowa in March through the acquisition of $1.2 billion-asset Homeland Bankshares of Waterloo, converted the Iowa bank's computer systems to its own the weekend of July 19. But Monday morning, customers began calling the bank complaining that their cards were not working.

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