OpenHMIS inventory and cashier errors

Application Name: Open MRS Version Number: Version: 2.0.6 Build 453af9 Question: Hi all i am trying to use OpenHMIS cashier and inventory modules i did installation as prescribed in the documentation

every time i try to retrieve and post bill i get the following errors described in the imagesOpe

cc @BandaHealth

Hello @omrsegypt

The Cashier and Inventory modules do not yet work well on OpenMRS Platform 2.x We are in the process of updating these modules to run on this version of OpenMRS. Kindly consider using OpenMRS platform 1.11.x with reference application almost version 2.4