Unable to install Third-Party Software for Arduino Compatible Teensy Hardware in the version 1.58.1

Hello

I'm having a problem installing Teensy Core. The documentation suggests installing version 1.58.1, but this is no longer proposed in the https://www.pjrc.com/teensy/package_teensy_index.json file and the command :

arduino-cli core install teensy:avr@1.58.1 --config-file "C:\aCLI\arduino-cli.yaml"

returns an error :

Error during install: Platform 'teensy:avr@1.58.1' not found: required version 1.58.1 not found for platform teensy:avr

The available versions are 1.58.2 and 1.59.0. It is possible to install the latter, but compiling the simulink model returns an error because it is looking for version 1.58.1 (see the 5th line)

"### Generating static library."
"C:/Program Files/MATLAB/R2024a/bin/win64/gmake" -j5 -C "C:/PROGRA~3/MATLAB/SUPPOR~1/R2024a/toolbox/target/SUPPOR~1/ARDUIN~1/STATIC~1" SHELL="%SystemRoot%/system32/cmd.exe" -f teensycore.mk all
gmake[1]: Entering directory `C:/PROGRA~3/MATLAB/SUPPOR~1/R2024a/toolbox/target/SUPPOR~1/ARDUIN~1/STATIC~1'
gmake[1]: Leaving directory `C:/PROGRA~3/MATLAB/SUPPOR~1/R2024a/toolbox/target/SUPPOR~1/ARDUIN~1/STATIC~1'
gmake[1]: *** No rule to make target `C:/ProgramData/MATLAB/SupportPackages/R2024a/aCLI/data/packages/teensy/hardware/avr/1.58.1/cores/teensy4/memcpy-armv7m.S', needed by `C:/Users/judic/DOCUME~1/MATLAB/R2024a/ARDUIN~1/TEENSY~1.0AR/FASTER~1/memcpy-armv7m.S.o'.  Stop.
gmake: *** [all] Error 2

In fact, at the beginning of the compilation messages, there are some pre-registered variables

TEENSY_LIB_VERSION = 1.58.1
TEENSY_GCC_VERSION = 11.3.1
TEENSY_TOOLS_VERSION = 1.58.0
TEENSY_CPU_FREQ = 600000000

Is it possible to modify these variables? Would this allow the compilation to finish if the expected version matches the installed one? Or should we ask the Teensy designer to make version 1.58.1 still available?

Many thanks

[Judicael Aubry]

I found a solution by installing version 1.58.2 and simply changing the folder name to 1.58.1, it works.