Fusion 360 for Makers, 2nd Edition

There are two kinds of errors: dependency and geometry.

• Dependency error: Dependency errors occur when something goes

missing from a sketch. If one feature uses the geometry of another it is

dependent; if that other geometry is modified, a dependency error occurs.

For example, Fillet is an operation applied to an edge; if the edge is no

longer there, there’s a dependency error. The best solution is to notice

the error right away and undo whatever you just did. Often the problem

change was unnecessary or even accidental. To minimize the chances that

dependency errors will occur, avoid unnecessary dependencies or use

the most stable dependency; ...