ARB fails with 'Exec format error' (in Ubuntu through Parallels on an M1 Mac)

[guest]

Good day,

I am trying to run ARB version 7.0 on 64Bit Ubuntu 20.04 LTS through Parallels on an M1 Mac Mini (2020) version 12.2. I installed arb-7.0.ubuntu2004-amd64.tgz.

My guess is that this is because I am running ARB through a virtual machine, based on this post from 7 years ago, in which someone gets the same error but they were using 32bit Ubuntu and 64Bit ARB: ​http://bugs.arb-home.de/ticket/635. Either way, I would really like to get ARB going on Ubuntu through parallels if it is possible.

Below is the terminal session to produce the error:

parallels@ubuntu-linux-20-04-desktop:~$ arb
Using ARBHOME='/home/parallels/arb'
Using properties from /home/parallels/.arb_prop
Please wait while the program ARB is starting .....
Waiting for '/home/parallels/.arb_tmp/sockets/arb_launcher.2566'..
Fri 11 Feb 2022 01:30:00 PM MST arb server.log created by arb_launcher
[arb_launcher[0]: log for ARB_PID='2566']
[arb_launcher[0]: Starting 'arb_ntree'..]
/home/parallels/arb/bin/arb_launcher: line 31: /home/parallels/arb/bin/arb_ntree: cannot execute binary file: Exec format error
[arb_launcher[0]: 'arb_ntree' has terminated with error 126]
[arb_launcher[0]: Still have 1 arb processes..]
[arb_launcher[0]: All launched processes terminated]
[arb_launcher[0]: cleaning up arb session]
No matching processes detected.
rmdir: failed to remove '/home/parallels/.arb_prop/logs/20220211_133000.2575': Directory not empty

Session log has been stored in /home/parallels/.arb_prop/logs/session.20220211_133000.2575.tgz
    and is also accessible via /home/parallels/ARB_last_session.tgz

Run Log:

[arb_launcher[0]: log for ARB_PID='2817']
[arb_launcher[0]: Starting 'arb_ntree'..]
/home/parallels/arb/bin/arb_launcher: line 31: /home/parallels/arb/bin/arb_ntree: cannot execute binary file: Exec format error
[arb_launcher[0]: 'arb_ntree' has terminated with error 126]
[arb_launcher[0]: Still have 1 arb processes..]
[arb_launcher[0]: All launched processes terminated]
[arb_launcher[0]: cleaning up arb session]
No matching processes detected.
abnormal termination (NTREE_STATUS='crash')
Fri 11 Feb 2022 01:30:51 PM MST End of log (now archive into /home/parallels/.arb_prop/logs/session.20220211_133049.2823.tgz)

Any help is greatly appreciated! Thank you,

Chantel

[westram]

Hi Chantel,

i think your ubuntu runs an arm64 (or aarch64) architecture while the arb binaries are amd64 (aka x86_64). These architectures are not binary compatible.

You can check the architecture of your ubuntu using

uname -m

We do not support arm64 architecture for arb, that means it is not known whether arb would build there. Even if it would build w/o many changes, it would need in-depth testing to ensure arb works correctly, before anyone should use it.

There are possibilities to run amd64 binaries on arm architectures (e.g. see this ​discussion on stackexchange).
You should be aware that

• arb will run emulated i.e. probably much slower and
• we did not yet receive any reports that arb has been used this way.

Another possibility would be to build arb using ​homebrew-arb.
There is a section about ​Using a Mac with M1 processor and we know at least one who works with this setup

Ralf

[westram]

probably solved