This alert appears when you select only part of a measure, but then choose a command that works only on full measures.
To view this dialog box, click the Selection Tool. Select a region containing partial measures. Choose one of the following Utilities Menu commands, which can only be applied to increments of a full measure: Check Ties, Convert Mirrors, Explode Music, Implode Music; Music Spacing submenu: Apply Beat Spacing, Apply Note Spacing, Apply Time Signature Spacing; Fit Measures; Move/Copy Layers.
See Also:
