Understanding Error Code 51009

How to understand error code 51009

The following error can occur when the tech branch does not match the global filter. It appears global filtering is being used in Signature. Labor will have to be manually entered on the call.

System.Exception: Procedure: obsp_TechPROCompleteCheckoutAppointment - Error Code: 51009 - Error String: Error Completing checkout appointment ServiceCall:  2005-0687 Appointment: 0002 Technician:  KENN02 ErrString: 51009
   at OmniByte.TechPRO.WennSoftGP.WennSoftGP.CompleteCheckoutAppointment(String Service_Call_ID, String Appointment, String Technician)
   at OmniByte.TechPRO.WebAPI.Controllers.ERPFullAppointmentCheckoutController.Get(Int32 checkoutLogID) in C:\Adam\TechPro\Branches\Version 3-2-1-5810\WebAPI\OmniByte.TechPRO.WebAPI\OmniByte.TechPRO.WebAPI\Controllers\ERPFullAppointmentCheckoutController.cs:line 314