Document Editing Problems

Fix Word VBA Cannot Process Vertically Merged Table Rows

Camila Milosovich Sep 27, 2026 868 views

Question details

Users need a solution or workaround for when a Word VBA macro fails to set consistent row heights in a table containing vertically merged cells.

How to Fix Word VBA Cannot Process Vertically Merged Table Rows

Product: Microsoft Word
Device & OS: not provided
Scenario: Running a VBA macro script to automatically adjust and format the row heights of a document's tables.
Observed behavior: The macro throws an error or fails to execute because Word's object model does not expose vertically merged areas as independent rows.

Before you start

Before modifying your VBA scripts or altering table structures, save a backup copy of your document to prevent any accidental data or formatting loss.

Solution 1Recommended

Split Merged Cells Before Running the VBA Macro

The most reliable workaround is to temporarily remove the vertical merges, execute your macro, and then re-merge the cells.

Since the Word VBA object model cannot map individual row indexes when vertical merges are present, you must eliminate the merges to allow the script to access the Row collection.

Select the vertically merged cells

Highlight the cells in your table that are currently merged vertically.

Split the cells

Navigate to the Table Layout tab on the ribbon and click the 'Split Cells' button to revert them to individual rows.

Run your VBA macro

Execute your VBA script to successfully apply the desired row heights across the now-uniform table.

Re-merge the cells

Once the row heights are set, highlight the cells again and click 'Merge Cells' in the Table Layout tab to restore your original design.

Split Merged Cells Before Running the VBA Macro

Table Redesign: If you process this document frequently, consider redesigning the table to avoid vertical merges entirely, which will permanently prevent this VBA error.

Solution 2

Update VBA to Skip Non-Uniform Tables

Modify your VBA script to automatically detect and skip tables with merged cells to prevent the macro from crashing.

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Frequently Asked Questions

Why does Word VBA fail when modifying rows in tables with vertically merged cells?

In Microsoft Word, vertically merged cells disrupt the standard row index mapping. The VBA object model cannot accurately identify individual row objects when a cell spans multiple rows, causing any automated row height adjustments to fail.

How can I identify tables with merged cells using VBA?

You can use the 'Table.Uniform' property in your VBA script. If this property returns False, it means the table contains merged or split cells, allowing you to program your macro to skip it safely.

Do horizontal merges cause the same VBA row errors?

Horizontal merges typically do not break the row collection in the same way, so you can often still process row heights. However, trying to access specific columns in a horizontally merged table may trigger similar VBA mapping errors.

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