When saving a Test Case or a Test Result, I get an exception with the code 01-2426
The error says "Format Error: the specified format is invalid. (01-2426)".
This occurs in the Aligned Elements Windows Client.
This effect has to do with tables used (also called nested tables) in cells in the Table Attribute.
There is a known issue when the right edge of a nested table “touches” the column separator as in the image below.
How to solve it
You avoid this by increasing the width of the Object form (by maximizing the Aligned Elements application GUI or use a large monitor or collapsing the Project Explorer or making the Project Explorer narrower etc.) or making the table narrower.