Allocation problem

I am trying to run the following allocation:

*RUNALLOCATION

*FACTOR=USING/(TOTAL+0.0000001)

*DIM PLANCUST WHAT=PLCUST.INP; WHERE=BAS(3PLCUST); USING=<<<; TOTAL=<<<;

*ENDALLOCATION

*COMMIT

And the work status settings on the Application are all set to "No" and i keep getting the following error when i try to run the allocation:

Allocation Aborted: Some destination regions were found secured.

Any ideas what could be causing this problem?