"Internal" compiler produces no hex file

Hi, well, as a newbie I ran into the following problem:
everything works fine with an externally produced hex file. But when using the "internal" compiler I get "Error: Hex file does not exist" ("Fehler: Hex Datei existiert nicht:") when trying to upload. For me it looks like the compilation runs without an error - at least I can see not error message.
When using the Arduino IDE manually to produce a hex file, it works.
What am I missing ?

Linux Kubuntu 23.04, SimulIDE 1.0.0, Arduino IDE 1.8.19

Here the output:

Executing:
"/usr/share/arduino-builder" -compile -hardware "/usr/share/hardware" -tools "/usr/share/tools-builder" -tools "/usr/share/hardware/tools/avr" -built-in-libraries "/usr/share/libraries" -libraries "/libraries" -fqbn=arduino:avr:uno -build-path "/home/xetcst/SimulIDE_1.0.0-SR0_Lin64/user/Blinktest/build_Blinktest//build" -build-cache "/home/xetcst/SimulIDE_1.0.0-SR0_Lin64/user/Blinktest/build_Blinktest//cache" "/home/xetcst/SimulIDE_1.0.0-SR0_Lin64/user/Blinktest/Blinktest.ino"

Build folder: /home/xetcst/SimulIDE_1.0.0-SR0_Lin64/user/Blinktest/build_Blinktest/
SketchBook:
Arduino Board "arduino:avr:uno"


Fehler: Hex Datei existiert nicht:
/home/xetcst/SimulIDE_1.0.0-SR0_Lin64/user/Blinktest/Blinktest.hex

Hi.
Arduino in repository usually does not work in simulide (it is incomplete).
Only the full Arduino downloaded from Arduino works.

Yeah !!!! That did it - well, was not aware of that fact ......

Thank you very much !