Cannot open database (scheduler)

Hello,
The scheduler is stopped, al the lines are hours on running. When i add a new task, i receive a failure screen with the following text:

Cannot open database ". It may not be a database that yur apllication recognizes, or the file may be corrupt.

When i start start a task by the debug button, the task works fine.

Please help!

What is your repository type?

MSaccess

MS Access tends to get corrupted over time and it is not recommended for production.

Close AETL.
Open the repository in MS Access and do a compact and repair.

To avoid this kind of issue in the future switch to MS SQL server express.

You may find this article usefull
/wiki/advanced-etl-processor/advanced/repository-database/