 Truck drivers for Wisconsin-based truckload carrier Marten Transport say they received two fleetwide messages Tuesday afternoon from the companys top executive thanking them for their patience as the company continues to work through some systems issues it started experiencing Sunday. However, some drivers say there was little communication from the company about the systems issues prior to receiving those two fleetwide messages from Tim Kohl, CEO of Marten, through Omnitracs, the trucking companys fleet management system. 