I now obtain this message:
Error (209015): Can't configure device. Expected JTAG ID code 0x020F10DD for device 1, but found JTAG ID code 0x00000000. Make sure the location of the target device on the circuit board matches the device's location in the device chain in the Chain Description File (.cdf).
In the .cdf fil I have this:
/* Quartus Prime Version 18.1.0 Build 625 09/12/2018 SJ Lite Edition */
JedecChain;
FileRevision(JESD32A);
DefaultMfr(6E);
P ActionCode(Cfg)
Device PartName(EP4CE10E22) Path("C:/Users/claud/OneDrive/FJM/Test 5500 FP/output_files/") File("Test5500FP.sof") MfrSpec(OpMask(1));
ChainEnd;
AlteraBegin;
ChainType(JTAG);
AlteraEnd;
--EDIT--
I am trying repeatedly to transfer another project, on the same card and with the same USB-Blaster and everything is working properly.
So I guess it's not a hardware problem but something in the software configuration. What may have happened?