When uploading your Excel items or accounts file to SupeRep, if you get the error message:
A column must be deleted, or there are duplicate column headings, then you must check the following:
Your Excel file may contain columns that look empty to you, however may have some spaces/characters that were once in those column cells, but then erased.
Typically, if you select the last 4-5 empty columns immediately to the right of your data and delete them this will solve your problem.
If you get the error about duplicate headers, make sure each of your columns has a unique header and you did not mistakenly duplicate and columns.
Save the file you modified and upload it again.