# Error after adding meta-mender-core

**URL:** https://hub.mender.io/t/error-after-adding-meta-mender-core/6388
**Category:** General Discussions
**Tags:** yocto
**Created:** [November 28, 2023, 3:34pm UTC](https://hub.mender.io/t/error-after-adding-meta-mender-core/6388 "2023-11-28T15:34:46Z")
**Posts on this page:** 3
**Page:** 1

<div class="post-metadata">

### Author: ![maffan](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/maffan/32/2062_2.png) [@maffan](https://hub.mender.io/u/maffan)
#### Post date: [November 28, 2023, 3:34pm UTC](https://hub.mender.io/t/error-after-adding-meta-mender-core/6388/1 "2023-11-28T15:34:46Z")

</div>

These are the steps to reproduce the error

```auto
git clone git://git.yoctoproject.org/poky -b kirkstone
git clone https://github.com/mendersoftware/meta-mender.git -b kirkstone
source poky/oe-init-build-env
bitbake-layers add-layer ../meta-mender/meta-mender-core
bitbake --parse-only

```

These steps generates the following error

```auto
ERROR: ExpansionError during parsing /home/maffan/yocto/meta-mender/meta-mender-core/recipes-bsp/grub/grub-efi-mender-precompiled_2.04.bb | ETA: 0:00:01
Traceback (most recent call last):
  File "<expansion>", line 1, in <module>
bb.data_smart.ExpansionError: Failure expanding expression ${@'uboot_version_logic.inc' if d.getVar('MENDER_EFI_LOADER').startswith('u-boot') else ''} which triggered exception AttributeError: 'NoneType' object has no attribute 'startswith'
The variable dependency chain for the failure is: ${@'uboot_version_logic.inc' if d.getVar('MENDER_EFI_LOADER').startswith('u-boot') else ''}

ERROR: Parsing halted due to errors, see error messages above

Summary: There were 2 ERROR messages, returning a non-zero exit code.

```

Is this a bug or am I doing something wrong?

---

<div class="post-metadata">

### Author: ![TheYoctoJester](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/theyoctojester/32/1444_2.png) [@TheYoctoJester](https://hub.mender.io/u/TheYoctoJester)
#### Post date: [November 28, 2023, 3:42pm UTC](https://hub.mender.io/t/error-after-adding-meta-mender-core/6388/2 "2023-11-28T15:42:47Z")

</div>

Hi @maffan,

Its a known issue with `meta-mender-core` being in effect without `INHERIT += "mender-full"`. The easiest workaround is to set

```auto
MENDER_EFI_LOADER = ""

```

in your `local.conf` or `DISTRO´ configuration file - or proceeding to a full integration.

Greetz,  
Josef

---

<div class="post-metadata">

### Author: ![maffan](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/maffan/32/2062_2.png) [@maffan](https://hub.mender.io/u/maffan)
#### Post date: [November 28, 2023, 4:00pm UTC](https://hub.mender.io/t/error-after-adding-meta-mender-core/6388/3 "2023-11-28T16:00:04Z")

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Hi @TheYoctoJester,

Thank you for your quick response! I’ll just make sure to add that to one of my config files.

Regards,  
Marcus