Internal Error: Sub-system: VPR20KMAIN altera_arch_route_lookahead

Hi @Duko

It seems that this internal error is not found in our database. So there is no known workaround currently for this internal error (IE).

Since this is old version of Quartus, we recommend to upgrade the project to the latest Quartus version as there is a lot of fix being done.

If the design is too large, it will not fit in the device selected.

Best Regards,

Richard Tan

Hi @RichardTanSY_Altera

Update on the progress. I did update from 17.0 to 19.1 (latest version currently available within the company) and the issue persists.

Problem Details
Error:
Internal Error: Sub-system: VPR20KMAIN, File: /quartus/fitter/vpr20k/altera_arch_common/altera_arch_route_lookahead.cpp, Line: 4320
Internal Error
Stack Trace:
0xc7b1c: vpr_qi_jump_to_exit + 0x68 (fitter_vpr20kmain)
0x31d188: vpr_exit_at_line + 0x75 (fitter_vpr20kmain)
0x1ba337: aa_route_lookahead_setup_cached_lookahead_constants.cold.10901 + 0x311 (fitter_vpr20kmain)
0x1aee1e: aa_route_alg_route_all_nets.cold.10872 + 0x342 (fitter_vpr20kmain)
0x2d9f4d: l_rt_prl_worker(void*) + 0xeb (fitter_vpr20kmain)
0xd6477: l_thread_start_wrapper(void*) + 0x29 (fitter_vpr20kmain)
0x40e04: msg_thread_wrapper(void* (*)(void*), void*) + 0x6e (ccl_msg)
0x11bec: mem_thread_wrapper(void* (*)(void*), void*) + 0x5c (ccl_mem)
0xc2ee: err_thread_wrapper(void* (*)(void*), void*) + 0x27 (ccl_err)
0x6cc5: thr_thread_wrapper + 0x15 (ccl_thr)
0x704e: thr_thread_begin + 0x2e (ccl_thr)
0x7fa3: start_thread + 0xf3 (pthread)
0xf94cf: clone + 0x3f (c)

End-trace

Executable: quartus
Comment:
None

System Information
Platform: linux64
OS name: Debian GNU/Linux
OS version: 10

Quartus Prime Information
Address bits: 64
Version: 19.1.0
Build: 240
Edition: Pro Edition