A journal file must contain no more than 200,000 bytes and up to 100 accounting lines. A large workbook saved with the wrong extension is not a supported CSV or TSV file. Export the journal's four-column data as a genuine text file.
Remove unrelated sheets, commentary, unused columns and other working-paper content from the export range. Keep the original workbook separately. Do not remove valid debit or credit lines merely to shrink the file, because the resulting adjustment may no longer represent the complete source.
Save the reduced file as UTF-8 CSV or TSV and choose it again in Import journal lines. If the accounting entry itself exceeds the line limit, plan a set of independently balanced journals with clear source references rather than truncating the last rows.
A successful file read still requires validation of accounts and amounts. Inspect the preview line count and totals before using the lines. The file-size check protects the editor; it does not establish that the selected data is complete, correctly classified or ready for posting.
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