"Error executing code: Wrong type of element at call of ConIns."

Hi..

I am getting error while running the RunBaseBatch class it says, 

"Error executing code: Wrong type of element at call of ConIns."

Error executing code: Wrong type of element at call of ConIns.

 Stack trace:

  \Classes\BomCalcJob\pack - line 3

  \Classes\BomCalcJob_Item\pack - line 3

  \Classes\RunBase\promptPack - line 3

  \Classes\RunBaseBatch\promptPack - line 5

  \Classes\RunBase\promptPrint - line 13

  \Classes\RunBase\prompt - line 10

  \Classes\RunBaseBatch\prmpt - line3

  \Classes\BomCalcJob\main - line 53

  \Classes\FomrFunctionButtonControl\clicked

 [C\ \Classes\FormFunctionButtonControl\Clicked - line 12

 The code is compiled and working fine in another environment.

The error thrown on pack method, I try clearing the usage data and then retry it but error doesn't go away.

Can you please guide me how can i get rid of this error.