;Called from RPC: SDES CANCEL CLINIC AVAILABILITY
; This RPC cancels Clinic availability within a given timeframe for a given clinic.
; Input:
; SDCLNJSON [required] - Success or Error message
; SDCLNIEN [required] - The Internal Entry Number (IEN) from the HOSPITAL LOCATION File #44
; SDFULLPART [required] - Full or partial day cancellation ('F' for full, 'P' for partial)
; SDESBEGDTTM [required] - Start date/time in ISO8601 format (CCYY-MM-DDTHH:MM:SS-HH:MM)
; SDESENDDTTM [required] - End Date/time in ISO8601 format (CCYY-MM-DDTHH:MM:SS-HH:MM)
; SDCANREM [optional] - Cancellation Remarks (must be 3-160 characters if passed)
; SDEAS [optional] - Enterprise Appointment Scheduling (EAS) Tracking Number associated to an appointment.