I'm having quite a bit of trouble converting data to the AAVSO extended file format, I know it has something to do with selecting the correct columns from the Excel file that one obtains. If anyone could enlighten me, I will be eternally grateful.
Sorry to hear you are having trouble converting your data to AAVSO format. One thing to note is that it must be in plain text (ASCII) format so you will have to save your Excel file as comma delimited text (CSV) and be sure that it meets the requirements specified here: https://www.aavso.org/aavso-extended-file-format
If you are still having trouble uploading your data, please email me with your file attached.
Sara (sara [at] aavso.org)