# :PROTocol:PROTocol:STATus:REASon?

:PROTocol Commands

- :PROTocol Subsystem
- :PROTocol:MARKer
- :PROTocol:PROTocol:DFORmat
- :PROTocol:PROTocol:DISPlay
- :PROTocol:PROTocol:NSOurces
- :PROTocol:PROTocol:PLISting:INDex
- :PROTocol:PROTocol:SEARch:FIELd:ETYPe
- :PROTocol:PROTocol:SEARch:FIELd:FORMat
- :PROTocol:PROTocol:SEARch:FIELd:FTYPe
- :PROTocol:PROTocol:SEARch:FIELd:PAYLoad:RESet
- :PROTocol:PROTocol:SEARch:FIELd:PAYLoad:WDISplayed
- :PROTocol:PROTocol:SEARch:FIELd:PAYLoad:WORD:OPERand
- :PROTocol:PROTocol:SEARch:FIELd:PAYLoad:WORD:POPerator
- :PROTocol:PROTocol:SEARch:FIELd:PAYLoad:WORD:RESet
- :PROTocol:PROTocol:SEARch:FIELd:PAYLoad:WORD:SYMBol
- :PROTocol:PROTocol:SEARch:FIELd:PAYLoad:WORD:TYPE
- :PROTocol:PROTocol:SEARch:FIELd:PAYLoad:WSIZe
- :PROTocol:PROTocol:SEARch:FIELd:RESet
- :PROTocol:PROTocol:SEARch:GTYPe
- :PROTocol:PROTocol:SEARch:PTYPe
- :PROTocol:PROTocol:SEARch:RESet
- :PROTocol:PROTocol:SEARch:SEARch
- :PROTocol:PROTocol:SEARch:SOURce
- :PROTocol:PROTocol:SFORmat
- :PROTocol:PROTocol:SLISting:INDex
- :PROTocol:PROTocol:SOURce
- :PROTocol:PROTocol:SOURce:NAME?
- :PROTocol:PROTocol:STATus?
- :PROTocol:PROTocol:STATus:DETails?
- :PROTocol:PROTocol:STATus:REASon?
- :PROTocol:PROTocol:TYPE
- :PROTocol:PROTocol:WSIZe

## Query Syntax

    :PROTocol:PROTocolN:STATus:REASon?

Where N identifies one of four possible protocol decodes {1:4}. For example, `PROTocol3`.

## Description

Returns a string that explains the reason for a questionable or invalid protocol decode. If the protocol decode is correct, a null string is returned.

Additional information about the questionable or invalid protocol decode may be available using the `:PROTocol:PROTocol:STATus:DETails?` sibling query. Use the `:PROTocol:PROTocol:STATus?` parent query to determine if the decode is questionable or invalid.