In the Microsoft Project (MSP) New Driver, receive an intermittent error message: "We're sorry. There seems to be a problem with this file that keeps us from opening it. Please try using a backup copy if available." when attempting to open a project from CA Project & Portfolio Management (PPM).
This is caused by DE39765
This issue applies to CA PPM 15.2, 15.3, and 15.4 MSP New Driver
This issue is fixed in CA PPM 15.4.1.
Note: In order to see this fix, (and any other CA PPM MSP Interface fixes) after upgrading CA PPM, the MSP New Driver version on each workstation will also need to be upgraded to the latest driver from PPM's Software Downloads section. This applies to both patches and releases.
Option 2: If the above that doesn't help, as a temporary workaround, reducing the number of notes in the project has helped to allow the project to open. The Notes information can be stored locally in a document until the issue is resolved where the Notes can then be added back to the tasks. Notes can be deleted via PPM using the following steps:
Note: In rare circumstances, you may run into an error accessing a note in PPM when using the above workarounds. If after deleting other notes, you still can't open the project in MSP, you can try deleting the task completely in PPM (Note that if the task has actuals, you will receive an error that the task can't be deleted, but in MSP, the task will show under a "Deleted Tasks" section, and the Note should then be removed). Before deleting the task, take note of the data in the task including any dates, assignments, etc, as it will need to be recreated.
If the above doesn't help with the issue you are seeing, see KB000004116 for details on another cause of the 'We're sorry. There seems to be a problem with this file' error in CA PPM 14.3, 14.4, and 15.2.
See the below for the list of known CA PPM MSP Issues and Defects: