@Simorq: nope ,it works for me with d256mb:mt2:ldmf1
@yashita : patience man.
V 3.93x has additional precompressing parameters. It is -d .
It can decrease well the decomp memory req.

But v3.93 has bugs,too:
For me,it creates crc errors @decompression if i use my pc @compress-stage(browsing,etc).
Examples for the -d parameter:
Srep64 -a8 -m5f -l512 -d1g input.dat output.srep
-d1g can be modified until out of RAM. (D2g ,d4g,d512mb,d1536mb,etc)
And now,here goes my question to the real professionals,especially @Bulat :
V393x, the -d (dict. compression) parameter has additional settings. h,l and c. Yes,dont mess with them,but sometimes i must.

Srep -l512 -d8g:h2g input.dat output.srep
It creates srepfile with 2.5 gb decomp. meamreq. Without the -d its 8.3 gb.
I pass those to arc.exe with the following ,but it IGNORES:
arc.exe -msrep:l512:d8g:dh2g output.arc input.dat
Resulting files decomp memory req still 8.3gb ,while the created with srep is 2.5 gb.
What am i did wrong?!
@mods : sorry,wrong thread(?). Please move it to the correct place. Thank you very much !