Guide / Every rule

Connection in the file but not on the canvas

The check drawing/lost-connection, in the group Drawing.

Error

Why it matters

The file describes a connection that the editor did not draw, so it is invisible and cannot be selected.

How to fix it

Connect the two elements again on the canvas; the stray connection is dropped when the file is saved.

Where you see it

The Problems tab lists it under Problems, and outlines the element on the canvas. In a terminal, penstock check --only drawing reports it as LOST-CONNECTION. Auto layout often fixes it for the whole diagram at once.

Rule details

Read more: Diagram check. All rules: Every rule.