TrimbleSessions layer is missing some mandatory fields."

Error Message

“TrimbleSessions layer is missing some mandatory fields.”

This error message displays in the Trimble Positions Desktop add-in version 10.1 in ArcMap, namely the Trimble Positions Desktop Administration window. The Trimble Positions Desktop add-in is used in conjunction with the Trimble Positions ArcPad Extension or Trimble Positions Mobile Extension.

After clicking on the ‘Enable Geodatabase’ button to create the TrimbleSessions feature class, and clicking ‘Run Tests’ from the GNSS Enabling dialog box, the error displays in the ‘Compatibility Testing’ window. In this case, the compatibility test is performed against the Trimble Positions Mobile Extension.

Cause

The TrimbleSessions feature class was generated in a personal geodatabase that contains an invalid field in the attribute table called "Note_".

The word "Note" is considered a Microsoft Reserved Word, and cannot be used in any field name since a personal geodatabase (or .mdb file) is a Microsoft Access database type.

Due to this Microsoft limitation and because the default mandatory schema for the TrimbleSessions layer requires the Note field, the field is generated with an ‘_’ underscore at the end.

Although the field is present in the TrimbleSessions attribute table, because it is called "Note_" and not "Note", the Trimble Positions Desktop add-in considers the field to be missing.

Solution or Workaround