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The #SPILL error is Excel’s way of telling you that a dynamic array formula wants to pour results into multiple cells, but something is in the way. Maybe a helper column was added last minute, a few cells are merged for a pretty header, or you referenced an entire column so the array would overflow the grid. In Google Sheets you see similar behaviour when array formulas cannot expand. For a single file, hunting these down is fine. For a sales pipeline, client reporting pack, or weekly executive dashboard, it becomes a repetitive, error-prone chore.That is exactly where an AI agent shines. Instead of you opening every Excel or Google Sheets file, scanning for #SPILL style errors and manually fixing ranges, an AI computer agent can walk the workbook like a power user, detect blocked spill ranges, adjust formulas or layouts to your rules, log what changed, and do it again tomorrow at scale. You keep control of the logic; the agent does the clicking, checking and cleaning so #SPILL stops interrupting your workday.Delegating #SPILL maintenance to an AI computer agent turns a frustrating, low-value ritual into a background service. The agent can sweep through folders of Excel and Google Sheets files, surface risky formulas, standardise patterns, and repair spill issues before your team even opens the workbook. That means fewer fire drills, more reliable numbers, and more time for you to focus on strategy, not cell errors.
You know the moment. It is 8:45 a.m., your client or VP wants numbers by nine, and instead of a neat table you are staring at a stubborn #SPILL error in Excel. Or its cousin in Google Sheets, where your array formula refuses to expand. One cell is blocking the whole story.An occasional #SPILL is fine. But when you are running an agency dashboard, a sales forecast, or dozens of client files, these tiny errors add up. Let us walk through how to fix #SPILL manually, then how to hand the whole problem to an AI agent so you do not have to babysit spreadsheets.## 1. Understand What #SPILL MeansIn modern Excel, many functions (like FILTER, SORT, UNIQUE, SEQUENCE, XLOOKUP and even VLOOKUP with range inputs) return arrays. Instead of one value, they want to spill multiple results into neighbouring cells, called the spill range.Excel shows #SPILL when:- The spill range is not empty.- It hits merged cells or the edge of the sheet.- The array is too large or volatile to size safely.- You put a dynamic array formula inside a table, which cannot expand.Google Sheets behaves similarly with array formulas: if the output area is blocked or mis-sized, the formula will not expand properly.## 2. Manual Ways To Fix #SPILL (Step by Step)### A. Clear Obstructing Cells1. Click the cell showing #SPILL.2. Look for the dotted border that outlines the intended spill range.3. In Excel, open the error dropdown and choose Select Obstructing Cells.4. Delete or move the contents of those cells.5. Recalculate; the array should now spill.In Google Sheets, select the target range you expect the array to fill and ensure it is completely empty before re-entering the formula.### B. Unmerge Cells in the Spill Range1. Select the #SPILL cell.2. Identify any merged cells inside the dotted border.3. In Excel, go to Home > Merge & Center > Unmerge Cells.4. Optionally, use Center Across Selection to keep the visual layout without merging.5. Re-enter or confirm the formula so it can spill.### C. Move Dynamic Arrays Out of TablesDynamic arrays do not spill inside Excel tables.1. Right-click anywhere in the table.2. Select Table > Convert to Range.3. Re-enter your dynamic array formula outside the former table area.Or, if you only need one value per row (for example with XLOOKUP), use the @ operator:- Instead of XLOOKUP([Account], ...), use XLOOKUP([@Account], ...).This forces Excel to use implicit intersection, returning one value per row without spilling.### D. Avoid Oversized or Volatile ArraysIf you reference entire columns or generate huge arrays, Excel may show #SPILL because it cannot determine a stable size.1. Replace whole-column references (A:A) with bounded ranges (A2:A5000).2. Limit RANDARRAY or SEQUENCE sizes to what you actually need.3. Test the formula in a blank area of the sheet to confirm it spills correctly.In Google Sheets, the same principle applies: trim ranges and avoid unnecessarily large array outputs.### E. Fix Syntax or Broken LinksSometimes #SPILL just means the formula itself is wrong or points to a missing workbook.1. Double-check function arguments and parentheses.2. Verify external file paths and sheet names.3. Test a simplified version of the formula in a new area.## 3. When Manual Fixes Stop ScalingIf you manage one or two workbooks, the steps above are enough. But business owners, agencies, and revops teams often live in a jungle of spreadsheets:- Monthly client reports cloned from old templates.- Sales and marketing attribution models.- Finance workbooks with hundreds of interconnected sheets.Every time structures change, more #SPILL errors appear. You and your team become full-time spreadsheet janitors instead of strategists. That is the perfect moment to consider an AI agent.## 4. Automating #SPILL Fixes With an AI Computer AgentA Simular AI computer agent behaves like a meticulous power user living inside your desktop and browser. With Simular Pro, you can:- Open Excel or Google Sheets automatically.- Scan through tabs and workbooks for #SPILL and related array issues.- Click into each error, inspect the dotted spill range, and identify the cause.- Apply your playbook: clear helper cells, unmerge, resize ranges, or swap in @-style formulas where appropriate.- Log every change in a Google Sheet, Slack message, or CRM note via webhooks, so you always know what was touched.Because Simular agents operate across the full computer environment, they are not limited to APIs. They can:- Fetch workbooks from email, shared drives, or cloud storage.- Run at scheduled times or in response to triggers (for example, when a new report is generated).- Handle other admin tasks in the same run: exporting PDFs, uploading to client portals, or updating dashboards.## 5. Pros and Cons: Manual vs AI AgentManual fixes:- Pros: Full control, good for learning, fine for small models.- Cons: Repetitive, easy to miss edge cases, scales poorly when you have many files or contributors.AI agent automation:- Pros: Works across dozens or hundreds of Excel and Google Sheets files, consistent application of your rules, detailed logs, and runs while you sleep.- Cons: Requires an initial investment to design your playbook, test flows, and build trust in the agent.## 6. Turning #SPILL From Distraction Into Background NoiseThe real win is not just cleaner spreadsheets; it is reclaimed focus. Instead of your operations or finance lead spending hours chasing down #SPILL errors, you capture the logic once, hand it to a Simular AI agent, and let it execute with production-grade reliability.When the agent handles the low-level clicks, you get to ask better questions of your data: Which clients are most profitable, which channels are working, which experiments to run next. The spreadsheets are still there, but they are no longer screaming at you in all caps.If you are ready to stop fighting #SPILL and start delegating it, you can train a Simular agent on your Excel and Google Sheets workflow and let it keep your models clean while you focus on the work only you can do.