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Helper III
Helper III

Please help me figure out the origins of the blank rows of my Microsoft List


Please help me figure out the origins of the blank rows of my Microsoft List.


I have been testing a Microsoft Automated Flow that reads data from a CSV. To begin with, the flow is supposed to try to find a corresponding match in the "Title" column (so that the Title in a row in the List matches the Title in a row in the CSV file). When this happens, the corresponding row in the List is updated with the row information in the CSV file.


Now, here is the problem, there are now blank rows in the LIST. I do not understand how this could happen. I have seen in the past a situation where a CSV file can have a blank row from a edit mistake in EXCEL. When this happens, if you edit the CSV file in a text editor, you will see a row of commas depicting a row of blank cells. But I checked each CSV file I have used in my tests and none of them have one of these rows.


So what is going on here and how can I fix it? What could be causing these blank rows in my List?


Super User
Super User

Hi @W-M-Thompson,


I guess you're problem comes from the way you check title matches and retrieve matching source lines. If you had the design right, it won't return any matches for a blank row that might exist in one of your input CSV files. So no need to check CSV, but check the comparison condition and the corresponding row recovery.


If you want us to help you about this error, you should post your flow design.


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If the CSV file is opened in a text file, I can put the cursor on the line after the last line.  Maybe there is an issue with representing the return character '/r'.  But there is more.


I looked up another flow that I had worked on and found this:



This flow has a filter which takes the output from a previous step and filters out a line that equals to nothing.


But the flow I am wanting to apply this do does not have a previous step of converting the CSV to an array.  The logic of my new flow is different. 



Where can I insert logic where a blank line is ignored?


If I investigate this flow that has completed a run, I see this which is an indication that the new line was read into the flow:



if there is not a way to filter that out, there is the next line:



Please help.

Super User
Super User

Hi @W-M-Thompson,


Here's a sample CSV file to illustrate :



I've highlighted empty rows in my CSV.

[Edit] Of course your CSV don't have any but your output array from get content does. If your Get content output returns an empty string that's probably means your input CSV file has 2 \r\n at the end.


Now, my flow design to get CSV content, split lines and remove empty string from resulting array:




Note that I'm splitting line by using decodeUriComponent('%0D%0A') which means splitting by \r (%0D) \n (%0A)


Filter array excludes any empty string from compose output array.








If I have answered your question, please Accept the post as solution.
If you like my response, please Thumbs Up.

After I carefully deleted the empty lines in the List.  Then I made sure that each CSV file I test was first edited in a text file before I would test it via emailing it to myself.  I would hit CTRL+end to go to the very last character on the csv text file.,  If it appeared on the next to the last line, I would backspace this so that the last character in the file was the last character of the last line of the file.  


If I do these preliminary steps before testing, no black lines are entered in the List.


RIght now I am temporarily unable to access my work environment to post what you have asked for.



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