WCF-SQL Adapter Error: The Columns are Either Duplicated or not in a Sequence

This Wiki is based on Forum Post: WCF-SQL, Table Select: The columns are either duplicated or not in a sequence

Problem

While moving a working interface from one environment to another environment (e.g. from Test environment to Production environment), WCF-SQL Adapter started throwing the following error in the new environment:

*The columns abc and xyz are either duplicated or not in a sequence. Each column can only be selected one time, and columns must be selected in sequence.
*

Root Cause

Root cause of this issue is using Select * in polling statement while generating the Polling Schema and then in polling statement on Receive Location, and column sequence is different in both environments:

Solution

Solution is to use specific columns (better to use aliases) in polling statements:

See Also

Read suggested related topics:

• BizTalk Server: List of Errors and Warnings, Causes and Solutions

Another important place to find a huge amount of BizTalk related articles is the TechNet Wiki itself. The best entry point is BizTalk Server Resources on the TechNet Wiki.