Hi all, hope you are doing great!
I am here after a week of trying to solve something, and now I am asking for support if you don't mind.
Something unexpected started happening after no major changes in the system.

OS release:
NAME="FSLC X11"
VERSION="3.1 (dunfell)"
PRETTY_NAME="FSLC X11 3.1 (dunfell)"
DISTRO_CODENAME="dunfell"

I am developing an application to run on an ARM machine. I am using cross-compilation and then I run the executable file on that environment.

Everything was going okay until I try to run my script once more, but instead of running it again, the system responds with:
"./myApp: No such file or directory"

At first, I thought that could be something regarding my compilation target or similar, but after I realized that this was happening not only with my app file but with all the files I try to run on the system.

What I tried:

1)
root@apollo:/home/usrname/demos# file myapp
myapp: ELF 32-bit LSB shared object, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, BuildID[sha1]=fd11908f1b0542001bad5532976951d765f22f01, for GNU/Linux 3.2.0, with debug_info, not stripped

2)
root@apollo:/home/usrname# ldd myapp
OUT: "sh: /lib/ld-2.31.so: No such file or directory"
(but lib is there)

3)
I ran /usr/local/sigma/bin/testLib1 knowing the file is there but result was:
"sh: /usr/local/folder/bin/testLib1 : No such file or directory"

4) I ran $ ldd myapp
Output: "sh: /lib/ld-2.31.so: No such file or directory"
(but .so is there)

5) I ran $ lddconfig and tried to start again, but no such file remains.

6) I tried "$ ldd *.so" of several .so files I have in the dir, but the output is always: "-sh: /lib/ld-2.31.so: No such file or directory"

root@apollo:/usr/lib# ldd libaktualizr.so
sh: /lib/ld-2.31.so: No such file or directory

7) The name is right and autocomplete works:
root@user:/usr/lib# ldd ld-
ld-2.31.so ld-linux-armhf.so.3
root@apollo:/usr/lib# ldd ld-2.31.so
sh: /lib/ld-2.31.so: No such file or directory

8)
-rwxrwxr-x 1 root root 6461212 May2 18:31 myapp

I have no explanation for this.

Some network scripts stopped to start running automatically after rebooting, and I need to run them manually. I think something is not allowing executable files to run, but, what?

9) Searching on the web, I checked that name could be wrong (is not), and file needs to have "executable" permissions (It has)

Hello, trovasecantigas & welcome to LQ.

Cross compiling is not for the faint of heart. It sounds like You're not set up right in the chroot. You could do worse than go through CLFS book on linuxfromscratch.org. Alternatively, install a linux system on your sbc.

You need to give us diagnostic information if we are to spot your error"No such file or directory" error come when

1. The file is not found in one of the directories in the $PATH variable. The current directory is not searched
2. /lib/ld-linux.so has an issue

Try giving the full path name to your script

Here, you need to provide details to get fixes. If you have to keep this cloak & dagger, your answer will never come and you'll only annoy folks. Have you a link to this dunfell os?

EDIT: Is that FreeScale? Where the <expletive> did you get 'dunfell' from?

Thanks a lot for your answer.
Now it's solved.
ld command was issued since lib folder was deleted
Actually is Yocto Embedded Linux distro.