Column 'value' is present, but 'header' is not...

 
 
Error:
Column 'value{0}' is present, but 'header{0}' is not.
 
Explanation:
In the import file the columns Header1...X, Value1...X and Unit1...X are a trinity.
If Header1...X is missing and Value1...X is present, the error message appears on the screen:
 
If Value1...X is missing and Header1...X occurs, the error message appears on the screen:
 
If Header1...X and Value1...X are missing and Unit1...X occurs, the error message appears on the screen:
 
Solution:
Make sure that for each sequence number there is a Header, a Value and a Unit column in the import file.
Add the missing columns with the possible values to the import file and re-import.