I finally managed to download the database with 2.4.9, but I receive these errors again:

ERROR- userobject key 0x41D0001 does not exist
Send4600hostcommand: HC clear Timeout error. Cmd: 0x12 sethostptr: sendhostcommand error 2008 for dsp 0, address = y.0x792

It happens when I use IIR filter module, I already have some MODIIRQ in my program (from the 1427 Synthlike Filter patch).

my H8000fw only displays

ERROR – Suggest Power-Down

host timeout

when I power on/off I get the same message, I also tried to reset it with holding the levels at bootup