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Introduction

This document aims to assist users in identifying and resolving common errors that may occur in v11 of OpenSpecimen. These issues often arise due to recent enhancements and updates to the software.

1. "units" is null:

Error message: Error: NullPointerException:Cannot invoke "java.util.List.iterator()" because "units" is null(COMMON_SERVER_ERROR)

Solution:

1. Add the code "units" : [ ] in Collection Protocol (JSON) file and import CP JSON.