> Hi! > > Thanks for the reply and sorry for the ambigiouty, > even I find it difficult when I re-read =) > > For Var A,B and an integer array C; > Let B to have the domain of index values i, where A= C[i] > > if C(1,2,5,8,1) and A=1, then B could be 0 or 4. But that is exactly element(C,B,A), isn't it? -- Guido Tack http://www.ps.uni-sb.de/~tack