OpenMP: Loops are not parallelized

Hi 

I'm writing a Fortran-Program with Open-MP. 

!$OMP PARALLEL
!$OMP DO PRIVATE(j)
       DO I=1,10
          j = aIndex(I)
          ...
          VALUES(j) = ...
       END DO
!$OMP END DO
!$OMP END PARALLEL

The compiler refuses to parallelize this:

OpenMP Construct at file.for(2255,7)
   remark #16201: OpenMP DEFINED REGION WAS PARALLELIZED
...

LOOP BEGIN at file.for(2258,7)
   remark #17104: loop was not parallelized: existence of parallel dependence
   remark #15300: LOOP WAS VECTORIZED
LOOP END

Actually I *do* know, that aIndex contains only different indexes. Therefore the loop *can* be parallelized.

Is there any way to overrule the compiler? In OpenACC for example I could write

!$acc loop independent private(j)

Thanks

Benedikt