# Issue with Robust Delta Update
**URL:** https://hub.mender.io/t/issue-with-robust-delta-update/2501
**Category:** General Discussions
**Tags:** yocto, zeus
**Created:** [September 26, 2020, 1:05am UTC](https://hub.mender.io/t/issue-with-robust-delta-update/2501 "2020-09-26T01:05:03Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@oren](https://hub.mender.io/u/oren)
#### Post date: [September 26, 2020, 1:05am UTC](https://hub.mender.io/t/issue-with-robust-delta-update/2501/1 "2020-09-26T01:05:03Z")
When I deploy a delta update, it fails with the following error:
```
2020-09-26 00:55:12 +0000 UTC info: Running Mender client version: 2.3.0
2020-09-26 00:55:12 +0000 UTC info: State transition: update-fetch [Download_Enter] -> update-store [Download_Enter]
2020-09-26 00:55:12 +0000 UTC info: No public key was provided for authenticating the artifact
2020-09-26 00:55:14 +0000 UTC error: Module could not be executed: fork/exec /usr/share/mender/modules/v3/mender-binary-delta: no such file or directory
2020-09-26 00:55:14 +0000 UTC error: Artifact install failed: Module could not be executed: fork/exec /usr/share/mender/modules/v3/mender-binary-delta: no such file or directory
2020-09-26 00:55:14 +0000 UTC info: State transition: update-store [Download_Enter] -> cleanup [Error]
2020-09-26 00:55:14 +0000 UTC error: Could not execute update module: fork/exec /usr/share/mender/modules/v3/mender-binary-delta: no such file or directory
2020-09-26 00:55:14 +0000 UTC error: Cleanup failed: fork/exec /usr/share/mender/modules/v3/mender-binary-delta: no such file or directory
2020-09-26 00:55:14 +0000 UTC info: State transition: cleanup [Error] -> update-status-report [none]
```
Some extra poking around shows:
```
root@vexpress-qemu:~# ls -ltra /usr/share/mender/modules/v3/
total 110
-rwxr-xr-x 1 root root 1637 Sep 24 21:55 single-file
-rwxr-xr-x 1 root root 207 Sep 24 21:55 script
-rwxr-xr-x 1 root root 150 Sep 24 21:55 rpm
-rwxr-xr-x 1 root root 1788 Sep 24 21:55 rootfs-image-v2
-rwxr-xr-x 1 root root 799 Sep 24 21:55 docker
-rwxr-xr-x 1 root root 1378 Sep 24 21:55 directory
-rwxr-xr-x 1 root root 140 Sep 24 21:55 deb
-rwxr-xr-x 1 root root 100592 Sep 24 21:56 mender-binary-delta
drwxr-xr-x 3 root root 1024 Sep 25 22:32 ..
drwxr-xr-x 2 root root 1024 Sep 25 22:32 .
root@vexpress-qemu:~# /usr/share/mender/modules/v3/mender-binary-delta
-sh: /usr/share/mender/modules/v3/mender-binary-delta: No such file or directory
root@vexpress-qemu:~# file /usr/share/mender/modules/v3/mender-binary-delta
/usr/share/mender/modules/v3/mender-binary-delta: ELF 32-bit LSB pie executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 3.2.0, BuildID[sha1]=2158fadc0e259cc99c065a1038ffe5f7c2f81541, stripped
root@vexpress-qemu:~# file /lib/ld-linux-armhf.so.3
/lib/ld-linux-armhf.so.3: cannot open `/lib/ld-linux-armhf.so.3' (No such file or directory)
root@vexpress-qemu:~# file /usr/bin/mender
/usr/bin/mender: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.3, BuildID[sha1]=247b9ebd3ed538b508512e8781267646eb94bfaa, for GNU/Linux 3.2.0, stripped
root@vexpress-qemu:~# file /lib/ld-linux.so.3
/lib/ld-linux.so.3: symbolic link to ld-2.30.so
```
.
```
root@vexpress-qemu:~# uname -a
Linux vexpress-qemu 4.19.107-yocto-standard #1 SMP Thu Sep 24 20:44:03 UTC 2020 armv7l armv7l armv7l GNU/Linux
```
Running “ln -s /lib/ld-linux.so.3 /lib/ld-linux-armhf.so.3” did not solve the issue.
Device type: vexpress-qemu-grub
Any help will be appreciated.
---
### Author:  [@oren](https://hub.mender.io/u/oren)
#### Post date: [September 26, 2020, 12:47pm UTC](https://hub.mender.io/t/issue-with-robust-delta-update/2501/2 "2020-09-26T12:47:21Z")
It looks like I might have solved it by changing mender-binary-delta’s interpreter using patchelf
```
patchelf --set-interpreter /lib/ld-linux.so.3 ./mender-binary-delta
```
---
### Author:  [@drewmoseley](https://hub.mender.io/u/drewmoseley)
#### Post date: [September 28, 2020, 3:53pm UTC](https://hub.mender.io/t/issue-with-robust-delta-update/2501/3 "2020-09-28T15:53:20Z")
Interesting. I doubt anyone has tried running this on vexpress-qemu as I think we mostly use qemux86-64 for this testing now.
Drew