bitbake failed with ExpansionError - yocto

Question

Context:
I'm following the NXP i.MX7 Reference to build a Linux image for the i.MX 7 SABRE board. This process went smoothly, and I was successful in building and loading the krogoth image on the board. The problem arise when I tried to add the openembedded-core layer to my image. I immediately get the error below. I included my bblayers.conf for reference. Any help would be appreciated. I don't even need sqlite, so if there's a way to bypass it, then that would be fine.
Error:
ERROR: ExpansionError during parsing /fsl-community-bsp-platform/sources/openembedded-core/meta/recipes-support/sqlite/sqlite3_3.16.2.bb: Failure expanding variable SQLITE_PV, expression was ${#sqlite_download_version(d)} which triggered exception TypeError: getVar() takes at least 3 arguments (2 given)
bblayers.conf
POKY_BBLAYERS_CONF_VERSION = "2"
BBPATH = "${TOPDIR}"
BSPDIR := "${#os.path.abspath(os.path.dirname(d.getVar('FILE', True)) + '/../..')}"
BBFILES ?= ""
BBLAYERS = " \
${BSPDIR}/sources/poky/meta \
${BSPDIR}/sources/poky/meta-poky \
\
${BSPDIR}/sources/openembedded-core/meta \
\
${BSPDIR}/sources/meta-openembedded/meta-oe \
${BSPDIR}/sources/meta-openembedded/meta-multimedia \
\
${BSPDIR}/sources/meta-fsl-arm \
${BSPDIR}/sources/meta-fsl-arm-extra \
${BSPDIR}/sources/meta-fsl-demos \
"
The only difference between a successful build, and a failling build is the line: ${BSPDIR}/sources/openembedded-core/meta.

Answer 1

Don't add openembedded-core/meta to your bblayers.conf!
In your list, BBLAYERS =, the two entries
${BSPDIR}/sources/poky/meta \
${BSPDIR}/sources/openembedded-core/meta \
are both the same layer. meta in Poky, is taken directly from OpenEmbedded. The Poky repository is combined from multiple upstream repositoris using a script, combo-layer. (Which in my opinion is unfortunate, though I can see why it's being done).
If you wan't e.g. a newer version of meta, you need to update poky, or remove poky completely, and download openembedded-core and bitbake separately.

Answer 2

In my experience building BSP with yocto, specifically with NXP imx7, I have got ExpansionError very frequent. Most of the time, I found out that there is redundant package or layer or recipe in some cases. Once you remove them from installation, It works smooth.
In your case, Just remove following from the build and It should be fine.
${BSPDIR}/sources/openembedded-core/meta \