Writing to txt file using variable

Good morning all,

I am trying to export a specific dimension to a text file.  Issue I am running into is I need it to be sorted by stamp as it will be used for CPk calculations.  With the code below I am only getting export to the very last file "Stamp P".  I know I am missing an else or end but I am not sure what/where to use.  Variable "PID" is the stamp info pulled from earlier in the program.

$$ NO,
            
            ASSIGN/EXPORT=""
            IF/PID=="Stamp A"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp A.txt"
            END_IF/
            IF/PID=="Stamp B"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp B.txt"
            END_IF/
            IF/PID=="Stamp C"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp C.txt"
            END_IF/
            IF/PID=="Stamp D"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp D.txt"
            END_IF/
            IF/PID=="Stamp E"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp E.txt"
            END_IF/
            IF/PID=="Stamp F"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp F.txt"
            END_IF/
            IF/PID=="Stamp G"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp G.txt"
            END_IF/
            IF/PID=="Stamp H"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp H.txt"
            END_IF/
            IF/PID=="Stamp I"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp I.txt"
            END_IF/
            IF/PID=="Stamp J"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp J.txt"
            END_IF/
            IF/PID=="Stamp K"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp K.txt"
            END_IF/
            IF/PID=="Stamp L"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp L.txt"
            END_IF/
            IF/PID=="Stamp M"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp M.txt"
            END_IF/
            IF/PID=="Stamp N"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp N.txt"
            END_IF/
            IF/PID=="Stamp O"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp O.txt"
            END_IF/
            IF/PID=="Stamp P"
              ASSIGN/EXPORT="C:\Users\user\Desktop\part Cap Study\Exports\Stamp P.txt"
            END_IF/
$$ NO,
            
$$ NO,
            
FPTR       =FILE/OPEN,EXPORT,APPEND
            FILE/WRITELINE,FPTR,DIM_28.X.MEAS
            FILE/CLOSE,FPTR,KEEP

Thanks!