Your file contains more than 100 columns

When generating or saving a CSV file, a problem can occur when the actual text may contain many unnecessary blank cells that contain no data but still have to be processed by the system.

In order to prevent this situation, the number of coulmns in the file is limted to 100 (this is far more than should be required). If you see this message, it probably means your file is full of blank data. If you open it in a plain text editor, you will probably see thousands of commas and not much else.

The simplest way to resolve this is to open the file in excel, select all blank columns after your data, delete the data in them and then save the file. You should then see the file size reduce and if opened in a text editor, only the data should remain.