Barcode verifiers automate the verification process by capturing an image of the printed barcode and analyzing the image according to an industry specification. Industry specifications (e.g., ISO/IEC 15416,15415) identify common printing errors and prescribe test methods for detecting and quantifying these errors. Typically, these tests sample a barcode along one or more scan lines. Print errors that are parallel to these scan lines may be missed by the test. The present invention embraces a system and method to detect unprinted lines in barcodes resulting from a printer malfunction and produce a printer malfunction report with information regarding the quantity, position, and magnitude of these print errors.