Error A2004:symbol type conflict_ assembly

about troubleshooting error A2004:symbol type conflict errors

Using Masmplus to write the first assembler, the program is simple:

; A show Hello world! program
DATAS SEGMENT
STRING DB ' Hello world! ', 13, 10, ' $ '
DATAS ENDS

Codes SEGMENT
Assume Cs:codes,ds:datas
START:
MOV Ax,datas
MOV Ds,ax
LEA dx,string
MOV ah,9
INT 21H

MOV ah,4ch
INT 21H
Codes ENDS
End START

Hint Error:
Error A2004:symbol type conflict
Warning A4023:with/coff switch, leading underscore required for start Address:start

This is not really a problem with the program, because it can be used on MASM for Windows, and of course not the problem of tools, so it can only be your own configuration problem, because it is in the Aogo assembly station under the MasmPlas1.2 version, so the following configuration:

Configure--> System Configuration--> compile/script--> selected: Separate files default to DOS mode