Ledger Dimensions in AX2009

Hi All,

one of my client system structure designer is not open(general leder – > setup -->dimensions–>dimension sets).In dimension sets for their is a button structure design.

i got this error

error executing code:dimension topic object not initialized :

(c)\classes\dimension topic\tostring

(c)DataDictionary\tables\ledgerrowdefline\methods\checkrefrowstructure - line50

(c)Forms\ledgerrowdefdesigner\datasource\ledgerrowdef\method\executequery-line 38

(c)Forms\ledgerrowdefdesigner\datasource\ledgerrowdefLine\method\link active-line 32

i checked the code.their is no modifications on that.

is this any set up problem

if anyone knows please tell me as early as possible.