These are 2-D math parser errors caused by an incorrectly formed equation or inequality.

Example 1

In this example, an incomplete equation has been entered.

Solution:

To fix the error, enter a complete equation.

Example 2

$\>\sin \left(x\right)$

In this case, an expression was entered after an angle bracket as an attempt to use a Maple prompt (which always displays in red) within Document mode. Document mode uses document blocks as the default input region. However, it is possible to insert a Maple prompt input region while in Document mode.

Solution:

To insert a Maple prompt while in Document mode, from the Insert menu click Insert → Execution Group → After Cursor . You can then enter your expression and press Enter to execute.

To return to entering text after the Maple input region, from the Insert menu click Insert → Paragraph → After Cursor .

Document Mode vs Worksheet Mode, Insert Menu