Unexpected error: An entry with the same key already exists.

[Narender]

Hello 

I am facing some issues in Power BI. After successful connection to the database, when I loaded the table then it shows an error:

Unexpected error: An entry with the same key already exists.
Details:
Microsoft.Mashup.Evaluator.Interface.ErrorException: An entry with the same key already exists. --->

I have not able to resolved this issue after taking many steps through internet. 

So if anyone knows about it then please assist me in this case asap. Please have a look towards it.

Below is the screenshot attached of the error

Thanks in advance 

Narender Makhija

[v-qiuyu-msft]

Hi @Narender,

1. Does the issue occur to this one specific table or all tables? 

2. Assume it's SQL data source, if you specify T-Query (select *from TAX_PERIOD) instead selecting the table, does the same issue occur? 

3. Please try to update Power BI desktop to the latest version if possible. 

4. Please share desktop trace log around the time that the issue occurs. 

Best Regards,
Qiuyun Yu