Error on regression analysis

When a single row breaks Excel's regression (RGP() or Analysis Toolpak), the cause is almost always one of three things:

1. A non‑numeric value in that row – even a space, an empty string (""), or a number stored as text (green triangle).
2. An error value – like #N/A or #VALUE!.
3. A hidden range mismatch – removing the row accidentally aligns your X and Y ranges, which suggests the original ranges had different row counts.

To fix it quickly:
On the problematic row, use =ISTEXT(cell) and =ISERROR(cell) across your columns to find the offending cell. Then clean it with Text to Columns (Data tab) or a formula like =TRIM(cell)+0.

The "small numbers bug" and "Labels checkbox" are unlikely to be the issue here – they don't cause a single specific row to fail.

Hope this helps🙂