precomp+serp+lzma+exe+delta decomperssion error

[medoman]

Hi friends .. it has been a while

So i used Razor12911 UltraArc method whic is amazing

but i'm using kind of old fashion simple installer so it gives me a decompression error code -2 telling me that compression method is unsupported by the arc.ini or unarc.ll
i tried every solution i could think but nothing changed same thing every time
and i'm kind of beginner so take it easy on me if it was a stupied smiole problem

[aswadd]

Unknown compression method means arc doesn't recognize the method you are using
for solution check for all the methods you are using whether it's exists or not in your arc.ini file
Also don't forget to include the same version of precomp in your installer

[Prince4]

Make the Precomp, SREP, and Dispack070's Methods.
By methods i mean both the compression and decompression parameters exist in the Arc.ini and you have the latest version of UnArc.dll and ISDone.dll