Error when editing column names in Advanced Query Editor

[meddojeddo]

Two columns were added to the source table which have the same names that columns already loaded were changed to. So I went into the Advanced editor and changed the names of the already loaded columns again to be different from the new columns added to the table. The preview showed the new columns added to the table. But then when close and apply, I get an error saying "Something went wrong: An error occurred while rendering the report" with no additional info other than a "Copy details" option and a "Report this issue". What is the problem? Is there something else I need to do in order to change the column names?

[Anonymous]

HI @meddojeddo 

Yep, create a new connection.

you can try the approach of changing the name in datasource itself if it will be consistent for later refreshes.

[Anonymous]

Hi @meddojeddo 

You need to modify the step which initially changed the name of the two previously added column to the non coinciding name.

If it still doesn't help. Copy the M Code and recreate the table as new. Make sure the steps are corrected as mentioned above.

[meddojeddo]

@Anonymous I modified that step by changing the new names to something other than the column names being added. So then in the preview it had both the new columns and the old columns, which is what I am looking for. But then when I close and apply I get that error. 

[Anonymous]

Hi @meddojeddo 

Can you send me the file or the M Code for the same.

[meddojeddo]

@Anonymous I don't think I can share the data due to data security issues, but I am wondering if it could be that adding those two additional columns throws off the value positions of the columns(e.g. Value1, Value2, etc.) and that is what is causing the issue since those value numbers are referred to when changing type in later query steps. But if that is the case, do you happen to know in what order the columns are numbered?

[Anonymous]

HI @meddojeddo 

The columns are sequenced as per the query.

I may be able to help if you can send the M code for the same.

Go to advance editor copy the code, this doesn't have the data.

[Anonymous · Accepted solution]

Hi @meddojeddo 

I don't see any issues with the M code no that you have suffixed the names with "old".

I was in a similar situation and I did create a new connection to the file and on the new connection I replaced the M code shared by you.

Can you give it a try If it doesn't work you have to give the file used in it with only one row and you can replace all the values in that row with test data.

[meddojeddo]

Alright, reconnecting to the data source and copying the M code into the advanced editor and deleting the old one solved the issue. Thanks. 

[meddojeddo]

@Anonymous so I should create a new connection to the same data source and then go to the advanced editor and insert this M code? 

Would changing the name of the new columns in the source data to something other than the named that the old columns were originally changed to also solve the issue?