Thanks for your reply.
I create a new file in my own Project forlder, paste the same csound example that already worked before and then it doesn't work in the new file.
Here's the console:
Building project ...
Build finished
Running project ...
0"068.421| WARNING: [main] duplicate call from main program to xenomai_init() ignored
0"068.718| WARNING: [main] (xeno-config --no-auto-init disables implicit call)
WARNING: [mError opening plugin directory '/usr/local/lib/csound/plugins-6.0': No such file or directory[m
[m0dBFS level = 32768.0
--Csound version 6.14 (float samples) Mar 11 2020
[commit: 4c7d6882d2327be60bfd183f6ac3b63b6a7327c9]
libsndfile-1.0.27
realtime mode enabled
UnifiedCSD: /root/Bela/projects/2020_FlexibleEvangelist/_main.csd
STARTING FILE
Creating options
Creating orchestra
closing tag
Creating score
realtime mode enabled
sorting score ...
... done
setting dummy interface
displays suppressed
0dBFS level = 1.0
orch now loaded
audio buffered in 256 sample-frame blocks
SECTION 1:
Initialising spinlock...
Starting realtime mode queue: 0xb4b21010 thread: 0x2a2cf0
Actually, when I create a new file, the option csd (for csound) is not available and the following message is on the window:
Create new file
Enter the new file name and extension (only files with .cpp, .c or .S extensions will be compiled).
Maybe I'm missing something really simple...