ALTERA 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-12.0-2.16-readme.txt Readme file for Quartus II 12.0 SP2 Patch 2.16 Copyright (C) Altera Corporation 2012 All right reserved. Patch created on August 30 2012 Patch Case#: 70458 //**************************************************************** Problem: Quartus II software triggers the following Internal Error when running compilation after doing "Update Symbol or Block..." in Block Editor. Internal Error: Sub-system: DBMUI, File: /quartus/db/dbmui/dbmui_manager.cpp, Line: 1179 Attempt made to free all hierarchy databases but the following callers are still accessing it: GEDQ_VIEW::get_sld_hdb_iname, Solution: This patch fixes the issue. Caution - You must either have previously installed the Quartus II 12.0 SP2 software or must install the Quartus II 12.0 SP2 software before installing this patch. Otherwise, the patch will not be installed correctly and the Quartus II software will not run properly.