Error during compilation

Hi everyone,

I'm using Quartus II tool and I have a problem during compilation.:

Error: Atom "s_addcnt[1]" must use sload port when SDATA port is used

Error: Atom "s_addcnt[2]" must use sload port when SDATA port is used

Error: Atom "s_addcnt[3]" must use sload port when SDATA port is used

....

Error: Atom "s_addcnt[17]" must use sload port when SDATA port is used

where s_addcnt is defined as UNSIGNED (17 DOWNTO 0) and it's used as a counter in a state machine.

My question is: Does someone know this kind of error and how could I correct it?