I run on a new PC :
C:\Users\aaa>java.exe -jar C:\PgmFiles\plantuml.jar -picowebNo diagram found
It is the same version as my old PC (1.2021.8)
When I test, I observe:
> java -jar plantuml.jar -picoweb
I find the problem: I copy the line
java -jar plantuml.jar -picoweb
from mail. The mail was UTF8. So the "-" of -picoweb was coded with 3 characters.
I discover this with an hex viewer.
Thanks for the support
Private joke of Unicode... (Often I observe the same thing with the non-breaking spaces...)