Workflow «AR Credit Memo Approval Request» (ARCMREQ) stopped at the activity “Check Credit Methods“

Hi,I’ve tried to create Credit Memo in iReceivables (a Dispute button).
But the workflow «AR Credit Memo Approval Request» (ARCMREQ) stopped at the activity “Check Credit Methods“.

Activity Definition:
    Name            Check Credit Methods
    Internal Name        CHECK_CREDIT_METHODS    
    Type             Function
    Description         Check Credit Methods
    Activity Version         11
    Result Type         Boolean
    Default Activity Result    NULL
    Message Name          
    Expand Roles         No
    Function Type         PL/SQL
    Function             ARP_CMREQ_WF.CHECKCREDITMETHODS
    On Loop Revisit         Reset
    Cost             0
    Error Workflow         System: Error
    Error Process          
    Start/End Node          
    Performer Role Type         Constant
    Performer Role          
    Developer Comment          
    Timeout          

In workflow details I see:
    ...
    Credit Method For Installments         <none>