Version Control - SVN - DAO.Recordset Errors

[crd]

We are working in a version controlled distributed environment with local models(EAPs).

We currently have 10 users (each with a separate version controlled EAP file).

We are receiving errors when issuing version control commands:

1  DAO.Database(3159) - Not a Valid Bookmark - this is received when running a get all latest on the entire project.

2.  DAO.Recordset (3022) - The changes you requeste to the table were not successful because they would create duplicate values in the indes, primary key or relationship.  Change the data in the field or fields that contain duplicate data, remove the indes or redefine the indes to permite duplicate entries and try again.  This is received whe attempting to check in a package.

3.  DAO.Recordset(3197) The Microsoft Jet database engine stopped the process because you and another user are attempting to change the same data at the same time.  This is received when attempting to check in a package.

I would love to have an explanation of these.  Does - not a valid bookmark - mean that a relationship between packages cannot be resolved?  Not being able to identify what is causing the error or even what package is in error is ....

I would appreciate any thoughts!  

Carol