This is what Coda sent me, and IT HELPED!Florian,
This problem may have been caused by editing measures in Scroll View
that were previously included in a multimeasure rest in Page View. To
solve the problem, go to page 1 in Page View, choose the Mass Mover
Tool, press Ctrl+A (or choose Select All from the Edit Menu), and go to
the Mass Edit Menu >> Multimeasure Rests >> Create. This will redefine
any multimeasure rests, and bring back "hidden" measures. After doing
this, be sure to press Ctrl+U (or choose Update Layout from the Edit
Menu).
Let us know if we can be of further assistance.
Trey
Coda Technical Support