I know PreComp 0.43 and its positive and negative side in the compression and decompression.

But shit i have had an oversight, i had not inserted the "n" in the line of the *arc.ini files.
In fact so
Code:
"packcmd = PreComp -intense0 -c- {options} -o arcpackedfile $$ $$. tmp $$ arcdatafile $$. tmp"
NOT working...
So
Code:
"packcmd = PreComp -intense0 -cn- {options} -o arcpackedfile $$ $$. tmp $$ arcdatafile $$. tmp"
works perfect.
Soon i upgrade my program with your method, thank you for your work.