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Help on extracting chars in LUA


New Coder
zzz = ipc.readSTR(0x0130, 256)
xyz = string.sub (zzz, -22)
abc=ipc.ask("here" .. xyz, WHITE)

returns nothing...

but if I hardcode zzz with "data within double quotes"
last 22 chars are returned

how do i make this work in a simple solution ?