Error: Access denied to method TRANSFER of class LedgerPostingGeneralJournalController in Ax 2012

Hi,

I have created a role which is non admin but have all the permission to execute project invoice tasks like ProjInvoiceProposal , ProjInvoiceMaintain etc privileges assigned. But users who are part of this role facing an error Access denied to method TRANSFER of class LedgerPostingGeneralJournalController in Ax 2012 while posting proj proposal invoice.But Admin users can do it without any problem. 

After doing some initial research I found out that I should assigned method Transfer(of class LedgerPostingGeneralJournalController) in required privileges(part of my role) and give invoke permission type.  But I discover that we can do this only for Static method and Transfer is non static method. 

So now I don't know how to proceed ahead. kindly help.

Thanks

Manoj Parashar