Design Space Explorer segmentation violation - Design Space Explorer segmentation violation Hi all, recently I am experiencing a segmentation violation error when trying to compile a Quartus project with the DSE. The single compilation is completed correctly by Quartus, from Analysis&Syntheses to Timing Analysis. However when I launch DSE locally, requiring 10 different compilations, Quartus quits unexpectedly reporting the following error: Problem Details Error: *** Fatal Error: Segment Violation at (nil) Module: quartus_dsew Stack Trace: 0x408f: IPC_COMMAND::parse_output(char const*, unsigned int) + 0xcb (ccl_ipc) 0x4804: IPC_COMMAND::run(std::string const&, std::string const&, bool, unsigned int*, std::string const&, bool) + 0x4ec (ccl_ipc) 0x66efe: CMPM_IPC_CLIENT::thread_proc(void*) + 0x47e (prj_cmpm) 0x602c: thr_final_wrapper + 0xc (ccl_thr) 0x407df: msg_thread_wrapper(void* (*)(void*), void*) + 0x62 (ccl_msg) 0xa559: mem_thread_wrapper(void* (*)(void*), void*) + 0x99 (ccl_mem) 0x8f92: err_thread_wrapper(void* (*)(void*), void*) + 0x27 (ccl_err) 0x63f2: thr_thread_wrapper + 0x15 (ccl_thr) 0x66d2: thr_thread_begin + 0x46 (ccl_thr) 0x76ba: start_thread + 0xca (pthread.so.0) 0x1074dd: clone + 0x6d (c.so.6) End-trace Quartus Prime Version 18.1.0 Build 625 09/12/2018 SJ Standard Edition Executable: quartus_dsew Comment: None System Information Platform: linux64 OS name: Ubuntu 16.04.6 OS version: 16 Quartus Prime Information Address bits: 64 Version: 18.1.0 Build: 625 Edition: Standard Edition Has anyone encountered a similar issue? The things that I have tried so far but unsuccessfully are: deleting db and incremental_db folders reducing the number of compilations allowing only 1 compilation at a time Unfortunately I cannot update Quartus to a newer version. Thank you Replies: Re: Design Space Explorer segmentation violation Hi, I’m glad that your question has been addressed, I now transition this thread to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you Best regards, KhaiY Replies: Re: Design Space Explorer segmentation violation Hi Giovanni, Generally, bugs are fixed in the newer version of the software. Since you could not upgrade the design to the latest version, v20.1 to verify if this is fixed in the software, you may use command line as a workaround for v18.1 Thanks Best regards, KhaiY Replies: Re: Design Space Explorer segmentation violation Dear @KhaiChein_Y_Intel , thanks a lot for your answer. Running DSE using command line works! Do you know if there is an explanation for this behavior? I am asking because the same problem may affect other components/processes in Quartus. Thank you Best regards, Giovanni Replies: Re: Design Space Explorer segmentation violation Hi, Can you try running DSE using command line ? Thanks Best regards, KhaiY