Task with custom method failed

Hi All,

I have created a custom class for workflow and used method in task.

When i instantiate method from SE24, method successfully executed but when workflow is triggered task goes in failure with error-

<Call of the method ZFI_FLAG of the class ZCL_FI_CO ST failed; the obligatory parameter E_FLAG has not been filledMessage no. W8899>

Task is background task.

I will be thankful if somebody can provide resolution for problem.

Thanks.

Edited by: sanj_dell on Feb 7, 2012 1:21 PM