INTEL DOES NOT WARRANT THAT THE FUNCTIONS CONTAINED IN THIS PATCH WILL MEET YOUR REQUIREMENTS, OR THAT THE OPERATION OF THIS PATCH WILL BE UNINTERRUPTED OR ERROR-FREE. //**************************************************************** quartus-19.1-0.19-readme.txt Readme file for Quartus Prime 19.1 Patch 0.19 Copyright (C) Intel Corporation 2019 All right reserved. Patch created on June 05 2019 Patch Case#: 1409335924 //**************************************************************** This patch fixes the following error for LVDS IP: Error: LVDS SDC cannot find IOPLL. Ensure IOPLL SDC is listed before LVDS SDC in qsf. Caution - You must either have previously installed the Quartus Prime 19.1 software or must install the Quartus Prime 19.1 software before installing this patch. Otherwise, the patch will not be installed correctly and the Quartus Prime software will not run properly.