FileMaker Client suddenly becomes "not modifiable"
Operating system version
Mac OS 10.7.3
Description of the issue
I am developing a database, hosted on FileMaker Server Advanced, and it's all working fine. The next day, I log on and the file has suddenly become "not modifiable" when I go to Layout mode and try to change something. Nothing in the permissions has changed since yesterday.
Steps to reproduce the problem
It happens randomly. I can't figure out what is making this happen.
The file should operate normally and allow me to change layouts.
When I go to layout mode and try to move anything, the file gives me the following error message: "This action cannot be performed because this file is not modifiable."
Exact text of any error message(s) that appear
"This action cannot be performed because this file is not modifiable."
The file was converted from FileMaker version 11 and is now hosted on FileMaker Server 12 Advanced. I am opening it in FileMaker 12 Advanced client through the "Open Remote" dialogue box.
I have to close the file, recover it, and re-open it on the server again in order for it to work again. This is very frustrating, because it's happening quite often. The recovery process does not show anything was wrong with the file, but the recovery process somehow makes the file work normally again.