Problems uploading flash memory -- part 2

Thank you, sirene. BUP works now.

Out of curiously, why do we need this new --pfl flag? I was under impression that PFL programming data stream is exactly the same as [uncompressed] passive serial which is supposedly a default for sof2flash. However the fact is - on S4-GX devkit without new flag PFL doesn't work. Where is a catch?

Another question. Why is sof2flash so damn slow?

I already figured out that Altera tools programmer, especially those from the assembler, sopcbuilder and Nios sides, value their time well above their customers time so they code in perl, tcl or at best in java what for the customer's benefit should be coded in C/C++. However in case of 'sof2flash --pfl' the slowness was taken to a new extreme and now, instead of being just annoying, it really disturbs the development process.