http://www.mapleprimes.com/questions/43660-Help-With-Error-Message en-us 2026 Maplesoft, A Division of Waterloo Maple Inc. Maplesoft Document System Wed, 10 Jun 2026 20:49:42 GMT Wed, 10 Jun 2026 20:49:42 GMT The latest answers and comments added to the Question, Help With Error Message http://www.mapleprimes.com/images/mapleprimeswhite.jpg http://www.mapleprimes.com/questions/43660-Help-With-Error-Message http://www.mapleprimes.com/questions/43660-Help-With-Error-Message?ref=Feed:MaplePrimes:Help With Error Message:Comments#answer80646 Such an error usually occurs if one tries to edit the expression - for example, delete something, or insert. The underlying MathML structure can be easily broken. It is better to avoid such actions in 2D mode. If you want to be able to edit expressions, it is better to use an old-fashioned one-dimensional Maple input. Such an error usually occurs if one tries to edit the expression - for example, delete something, or insert. The underlying MathML structure can be easily broken. It is better to avoid such actions in 2D mode. If you want to be able to edit expressions, it is better to use an old-fashioned one-dimensional Maple input. 80646 Wed, 31 Aug 2005 04:37:18 Z alec alec