This is more a of Murphy's Law than a rule. Anticipate problems by providing the file in different file formats. Provide a color proof so we'll know what the job should look like. Each output methodology and material has it's limitations. Call us for more info.
Turn fills off and look for intersecting lines.
Clean up your artwork if you see these lines. Be sure to convert all type to outlines. Vinyl Cut Lettering and Graphics General Signmaking software is vector based. Most word processors, graphics programs and presentation programs use a combination of character based text and bitmapped images. Before we can open your file, you must output the file in a compatible format.