The Source Editor highlights syntax and semantic errors, such as missing semicolons and unresolved identifiers, in your source code when you do one of the following:
Errors are underlined in red and a glyph
is displayed in the left
margin of the editor window next to each line that contains an error.
An error message is displayed when you mouse over the glyph.
If there are any errors in a file, red marks are displayed in the error stripe on the right side of the editor window. The error stripe represents the whole file, not just the lines currently displayed. Double-click a mark in the error stripe to jump to the line the mark represents.