AssertionFailedException while using TableColumnLayout in eclipse

Question

I have a SWT Table inside a coposite, and i have used TableColumnLayout for dynamically resizing the table columns.

I get the following error while trying to launch the jface dialog which contains the table.

org.eclipse.core.runtime.AssertionFailedException: assertion failed: Unknown column layout data

This is the corresponding code used :

TableColumnLayout layout = new TableColumnLayout();
composite.setLayout(layout);

layout.setColumnData(column1, new ColumnWeightData(30));
layout.setColumnData(column2, new ColumnWeightData(30));
layout.setColumnData(column3, new ColumnWeightData(30));
layout.setColumnData(column4, new ColumnWeightData(30));
layout.setColumnData(column5, new ColumnWeightData(30));

Can anyone let me know What is causing me the error ?

Answer 1

The assertion is thrown if the column data is not an instance of ColumnWeightData or ColumnPixelData for all the defined columns. So my guess is that you have not set the column data for one of your columns.