Hi,
I’ve built piaware from source for my PC (amd64) and I’m getting this error.
The piaware has been built WITHOUT fa-mlat-client
due to cx_Freeze issue....
MLAT will NOT be enabled ....
In the log I don’t see any issues or errors concerning cx_Freeze. What can I do?
The only thing you can do is to wait for Flightaware to update their source-code to be compatible with Bookworm. Once Flightaware updates their source code, you have to rebuild the piaware package and replace existing package with new package.
The warning message about fa-mlat-client appears because you have built piaware with following:
(1) On Debian 12 Bookworm or on Ubuntu 23
(2) Used following script at Github site https://github.com/abcd567a/piaware-ubuntu-debian-amd64
sudo bash -c "$(wget -O - https://raw.githubusercontent.com/abcd567a/piaware-ubuntu-debian-amd64/master/install-piaware.sh)"
The above script has following code which installs piaware without fa-mlat-client. The reason for doing this is that any attempt to build piaware on Bookworm in normal way (i.e. including fa-mlat-client) results in failure to build the piaware package.
elif [[ ${OS_VERSION} == bookworm ]]; then
sudo bash -c "$(wget -O - https://github.com/abcd567a/temp/raw/main/install-piaware-debian-12.sh)"
exit 0
In file https://github.com/abcd567a/temp/raw/main/install-piaware-debian-12.sh
cd ${INSTALL_DIRECTORY}/piaware_builder/package-${OS_VERSION}
sudo sed -i 's/python3-dev(>=3.9)/python3-dev/' debian/control
sudo sed -i 's/tcl-tls (>= 1.7.22-2)/tcl-tls/' debian/control
sudo sed -i 's/include <eval.h>/include <ceval.h>/' cx_Freeze-6.8.3/source/bases/Common.c
sudo sed -i 's/ clean_mlat-client / /' debian/rules
sudo sed -i 's/ build_mlat-client / /' debian/rules
sudo sed -i 's/ install_mlat-client / /' debian/rules
sudo sed -i '/cd mlat-client/s/^/#/' piaware_builder/package-bullseye/debian/rules
sudo sed -i '/fa-mlat-client/s/^/#/' debian/rules
sudo sed -i '/freeze-mlat-client/s/^/#/' piaware_builder/package-bullseye/debian/rules
sudo dpkg-buildpackage -b --no-sign
....
....
....
echo -e "\e[1;35mThe piaware has been built WITHOUT fa-mlat-client \e[39m"
echo -e "\e[1;35mdue to cx_Freeze issue.... \e[39m"
echo -e "\e[1;31mMLAT will NOT be enabled .... \e[39m"
Since even without mlat enabled, you can still feed data to flightaware, better continue running piaware without mlat till Flightaware makes its source code compatible to Bookworm, then reinstall piaware built from updated source code.
However if you are too keen to enable mlat, then instead of using piaware source-code from Fllightaware, use piaware source code from https://github.com/WhoAmI0501/piaware_builder. This source-code is forked from Flightaware, but it is modified to build piaware on Bookworm with fa-mlat-client.
To build piaware from above noted mlat-enabled source-code, do following:
sudo apt install python3-pip
sudo apt install cmake
sudo apt install devscripts
sudo apt install build-essential
sudo apt install debhelper
sudo apt install tcl8.6-dev
sudo apt install autoconf
sudo apt install python3-dev
sudo apt install python3-venv
sudo apt install libz-dev
sudo apt install zlib1g-dev
git clone https://github.com/WhoAmI0501/piaware_builder
cd piaware_builder
sudo ./sensible-build.sh bookworm
cd package-bookworm
sudo dpkg-buildpackage -b --no-sign
cd ../
sudo dpkg -i piaware_*.deb
Thanks. That does also fail:
e3b3fa8 (grafted, HEAD, tag: v8.2) No change release for 8.2
Retrieving v0.2.13 from https://github.com/mutability/mlat-client.git
Cloning into './package-bookworm/mlat-client'...
warning: Could not find remote branch v0.2.13 to clone.
fatal: Remote branch v0.2.13 not found in upstream origin
I got the mlat-client from adsbexchange to work. Can I use it for piaware?
This is because of an error in file sensible-build.sh of WhoAmI0501 fork of piaware_builder.
The mlat-client version v0.2.13 does not exist.
The correct version is v0.2.12
Below I have added a sed command to correct this error
OK do following
sudo apt install libboost-system-dev
sudo apt install libboost-program-options-dev
sudo apt install libboost-regex-dev
sudo apt install libboost-filesystem-dev
sudo apt install patchelf
sudo apt install net-tools
sudo apt install itcl3
sudo apt install tcl
sudo apt install tcl-tls
sudo apt install tcllib
sudo apt install tclx8.4
piaware_builder, clone fresh copy of source-code piaware_builder, correct the mlat-client ver mistake by sed command, and build & install piaware packagesudo rm -rf piaware_builder
git clone https://github.com/WhoAmI0501/piaware_builder
cd piaware_builder
sudo sed -i 's/mlat-client.git v0.2.13/mlat-client.git v0.2.12/' sensible-build.sh
sudo ./sensible-build.sh bookworm
cd package-bookworm
sudo dpkg-buildpackage -b --no-sign
cd ../
sudo dpkg -i piaware_8.2_*.deb
Thank you. That does also not work:
mlat-client(1994672): ImportError: /usr/lib/piaware/helpers/lib/_modes.cpython-311-x86_64-linux-gnu.so: undefined symbol: _PyFloat_Unpack4
The name of the symbol is now PyFloat_Unpack4.
I think i’ll just leave it until it is fixed upstream.
Just remove the cloned directory & defective piaware from WhoAmI0501, and run the script from my Github site (which you originally ran to build piaware without fa-mlat-client). It will feed Flightaware successfully and smoothly without any trouble The only thing missing will be mlat, which for me is acceptable as number of mlat planes in my area are less than 10% of planes with positions. Also this is a temporary handicap, and I expect the Bookworm compatible version of Flightaware code will be soon available.
WhoAmI0501 sitesudo rm -rf piaware_builder
sudo dpkg --purge piaware
sudo bash -c "$(wget -O - https://raw.githubusercontent.com/abcd567a/piaware-ubuntu-debian-amd64/master/install-piaware.sh)"
sudo piaware-config feeder-id xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
sudo piaware-config allow-manual-updates yes
sudo piaware-config allow-auto-updates yes
sudo systemctl restart piaware
Yes, v0.2.13 was apparently deleted a while ago, but not to worry: alternatively, you can manually change the line of sensible-build.sh from
shallow_clone https://github.com/mutability/mlat-client.git v0.2.13 "$OUTDIR/mlat-client"
to
shallow_clone https://github.com/wiedehopf/mlat-client.git master "$OUTDIR/mlat-client"
and everything should work again incl. MLAT – at least, it does over here…
That works, thank you.
3 green 
Mine is also synchronized and tracking aircraft.
“Multilateration (MLAT): Supported / Enabled (synchronized with 196 nearby receivers)”
What are those two errors of missing files or directories with your setup?
Not clear, no detail mentioned except “Error: 2 (no such file or directory)”
When I rebooted the computer, this error disappeared. 
However “not synchronized with any nearby receivers” persists even 35 minutes after reboot.
Please see screenshot below.
Just now I tried to install Adsbexchange feeder on Debian12 Bookworm AMD64 (same computer as in my posts above). The Adsbexchange mlat service failed with following error messages:
undefined symbol:_PyFloat_Unpack4
FULL ERROR MESSAGE:
92
94
96
---------------------------------
Sep 10 07:36:53 debian12 adsbexchange-mlat[3582]: self.require(requires)[0].run_script(script_name, ns)
Sep 10 07:36:53 debian12 adsbexchange-mlat[3582]: File "/usr/local/share/adsbexchange/venv/lib/python3.11/site-packages/pkg_resources/__init__.py", line 1517, in run_script
Sep 10 07:36:53 debian12 adsbexchange-mlat[3582]: exec(code, namespace, namespace)
Sep 10 07:36:53 debian12 adsbexchange-mlat[3582]: File "/usr/local/share/adsbexchange/venv/lib/python3.11/site-packages/MlatClient-0.4.2-py3.11-linux-x86_64.egg/EGG-INFO/scripts/mlat-client", line 26, in <module>
Sep 10 07:36:53 debian12 adsbexchange-mlat[3582]: from mlat.client.receiver import ReceiverConnection
Sep 10 07:36:53 debian12 adsbexchange-mlat[3582]: File "/usr/local/share/adsbexchange/venv/lib/python3.11/site-packages/MlatClient-0.4.2-py3.11-linux-x86_64.egg/mlat/client/receiver.py", line 26, in <module>
Sep 10 07:36:53 debian12 adsbexchange-mlat[3582]: import _modes
Sep 10 07:36:53 debian12 adsbexchange-mlat[3582]: ImportError: /usr/local/share/adsbexchange/venv/lib/python3.11/site-packages/MlatClient-0.4.2-py3.11-linux-x86_64.egg/_modes.cpython-311-x86_64-linux-gnu.so: undefined symbol:_PyFloat_Unpack4
Sep 10 07:36:53 debian12 systemd[1]: adsbexchange-mlat.service: Main process exited, code=exited, status=1/FAILURE
Sep 10 07:36:53 debian12 systemd[1]: adsbexchange-mlat.service: Failed with result 'exit-code'.
---------------------------------
adsbexchange-mlat service couldn't be started, please report this error to the adsbexchange forum or discord.
Try an copy as much of the output above and include it in your report, thank you!
---------------------------------
Hmm, that’s probably a very stupid question, so my apologies in advance: on the Pi, you did install the new ~/piaware_builder/package-bookworm/dump1090-fa_8.2_arm64.deb ? – I don’t know nothing about amd64…
P.S.: And I don’t use ADSBexchange anymore…
Yes, the adsbexchange feeder is using the mutability mlat-client, which is currently incompatible with debian bookworm.
Have you set the receiver coordinates correctly? Mine were set to a wrong location and it didn’t synchronize at first.
The location is the very first thing I checked when I found “Not Synchronized with nearby receivers”. I found the location (Lat/Lon). were already set correctly in “My ADS-B”, and were accurate upto 4 places of decimal. Same Lat/Lon I have set on other Bullseye receivers, and mlat synchronizes on all of these.
sudo raspi-config and set Language & Time Zone.(3.1) Replaced all occurrences ofbullseye by bookworm in files /etc/apt/sources.list & /etc/apt/sources.list.d/raspi.list by following sed commands. (Alternatively, this can be done by editing these files manually). After replacing bullseye by bookworm, updated apt.
sudo sed -i -e 's/bullseye/bookworm/g' /etc/apt/sources.list
sudo sed -i -e 's/bullseye/bookworm/g' /etc/apt/sources.list.d/raspi.list
sudo apt update
(3.2) Upgraded OS to Bookworm by folloing commands
sudo apt update
## the full-upgrade command below will take a long time
## It will installs about 450 new packages to replace old ones
## in-between it will ask questions 3 or 4 times, answer all by y (yes)
sudo apt -y full-upgrade
sudo apt -y autoremove
sudo apt -y clean
sudo reboot
# remove old config files
sudo apt purge ?config-files
sudo bash -c "$(wget -O - https://raw.githubusercontent.com/abcd567a/piaware-ubuntu-debian-amd64/master/install-dump1090-fa.sh)"
(6.1) Installed build tools & dependencies
sudo apt install -y python3-pip
sudo apt install -y cmake
sudo apt install -y devscripts
sudo apt install -y build-essential
sudo apt install -y debhelper
sudo apt install net-tools
sudo apt install -y tcl8.6-dev
sudo apt install -y autoconf
sudo apt install -y python3-dev
sudo apt install -y python3-venv
sudo apt install -y libz-dev
sudo apt install -y zlib1g-dev
sudo apt install -y libboost-system-dev
sudo apt install -y libboost-program-options-dev
sudo apt install -y libboost-regex-dev
sudo apt install -y libboost-filesystem-dev
sudo apt install -y patchelf
sudo apt install -y itcl3
sudo apt install -y tcl
sudo apt install -y tcl-tls
sudo apt install -y tcllib
sudo apt install -y tclx8.4
sensible-build.sh, the mlat-client source from mutability to wiedehopf, and build and installed the piawaregit clone https://github.com/WhoAmI0501/piaware_builder
cd piaware_builder
sudo sed -i 's/mutability\/mlat-client.git v0.2.13/wiedehopf\/mlat-client.git master/' sensible-build.sh
sudo ./sensible-build.sh bookworm
cd package-bookworm
sudo dpkg-buildpackage -b --no-sign
cd ../
sudo dpkg -i piaware_8.2_*.deb
