signal (6): Abort trap: 6 using Julia with ResistanceGA on Mac

[marafmuller]

I'm trying to create a resistance surface using Julia with the resistanceGA package in R, but the program always stops. I'm using macOS Ventura and Julia version 1.9.

I first run the GA.prep() and jl.prep() functions, and they both work fine (Circuitscape from Julia test passed). The issue comes when I try running the SS_optim() function and get the following info (never finishes running):

[ Info: 2023-05-30 11:51:52 : Precision used: None

[4673] signal (6): Abort trap: 6 in expression starting at none:0 The process has forked and you cannot use this CoreFoundation functionality safely. You MUST exec(). Break on __THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY_YOU_MUST_EXEC() to debug.

[4673] signal (11.1): Segmentation fault: 11 in expression starting at none:0 [ Info: 2023-05-30 11:51:54 : Precision used: None

[4679] signal (6): Abort trap: 6 in expression starting at none:0 [ Info: 2023-05-30 11:51:54 : Precision used: None

[4682] signal (6): Abort trap: 6 in expression starting at none:0 The process has forked and you cannot use this CoreFoundation functionality safely. You MUST exec(). Break on __THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY_YOU_MUST_EXEC() to debug.

[4679] signal (11.1): Segmentation fault: 11 in expression starting at none:0 The process has forked and you cannot use this CoreFoundation functionality safely. You MUST exec(). Break on __THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY_YOU_MUST_EXEC() to debug.

[4682] signal (11.1): Segmentation fault: 11 in expression starting at none:0 [ Info: 2023-05-30 11:51:54 : Precision used: None

[4676] signal (6): Abort trap: 6 in expression starting at none:0 The process has forked and you cannot use this CoreFoundation functionality safely. You MUST exec(). Break on __THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY_YOU_MUST_EXEC() to debug.

[4676] signal (11.1): Segmentation fault: 11 in expression starting at none:0_

I have not been able to figure out what the issue is.

Any help or advice will be much appreciated.

[vtjnash]

It sounds like something in your program is calling fork, but that introduces a data race into all code and thus is not allowed in multithreaded code.

[marafmuller]

Hi Jameson,

Thank you very much for your response. Do you have any advice on how to fix the issue?

Kind regards,

Mara Müller

On Tue, 30 May 2023 at 14:05, Jameson Nash @.***> wrote:

It sounds like something in your program is calling fork, but that introduces a data race into all code and thus is not allowed in multithreaded code.

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[ViralBShah]

Best to not run multi-threaded Circuitscape when calling from ResistanceGA. I suggest filing in Circuitscape.jl.