I am having a similar problem. I have a schedule setup to run a filemaker script every morning at 1am. It has been working fine and now it does not work, it runs with no error but it runs as if there are no scripts. The script normally takes about 10 mins to complete and now it just flashes status running for a brief second and then goes to status OK.
Sometimes when i go into the schedule setup and i proceed from the first screen called databases where you select the database username and password, i get an error saying that there are no available scripts for the password i have entered. I re-enter the full access password and then it allows me to go to the next screen but this still does not rectify the problem. I am running FMS 188.8.131.522