Array Formula Problems

[kathey1]

Can anybody tell me where i am going wrong with this generic line array family within the attachment ?

I want to be able to add a new Void every 225mm when i extend the line. the first time i tried to do it i got a error message saying ''THERE IS A CIRCULAR CHAIN OF REFERANCES AMONG THE FORMULAS'' so i decided to start again from fresh but i am getting nowhere with it.

Thanks

[rudolfweyers346383]

Under the type properties put the formula Length / Void_Spacing as a formula for the Number_Brackets. This should sort out your problem