Problem writing .SOF plus .ELF files with NiosII ECLIPSE FLASH PROGRAMMER using quartus 18.0 : error 8 during flash writing

After Intel traslation from Altera, we found serios degradation of documentation and support. Many links to help files are lost on Quartus. I found problems running modelsim, and I must solve them manually, by TCL modifications. I hope that INTEL will give a professional effort to FPGA questions, or we may think to different brands to plan realiable projects!