Fill Utility working only with Standard fields not fields created in USR layers

Dears,

when i made fill utility on fields created in USR layer , i faced the following problem

Error executing code: SysDictField object not initialized.

(C)\Classes\SysDictField\combinedTypeId

(C)\Forms\SysFillUtility\Methods\init - line 48

(C)\Classes\SysSetupFormRun\init - line 3

(C)\Classes\MenuFunction\run

(C)\Classes\FormFunctionButtonControl\Clicked - line 11

need your help for urgent.