Compile Error NSIS

install function ".MoveFolder_Locate_movefile" not referenced - zeroing code (10-42) out
install function ".MoveFolder_Locate_deleteDir" not referenced - zeroing code (42-47) out
I am not sure why I am getting this warning.
My Code in installer:
Section 0.01
!include 'FileFunc.nsh'
!insertmacro Locate
Var /GLOBAL "switch_overwrite"
StrCpy $switch_overwrite 1
; Move File or Folders
!insertmacro MoveFile "$INSTDIR\[path\]filename.xxx" "$INSTDIR\[path\]filename.xxx"
!insertmacro MoveFile "$INSTDIR\[path\]file2.xxx" "$INSTDIR\[path\]file2.xxx"
SectionEnd
Am I missing syntax or have I not referenced a nsh file..
The help section is where I got the code. Help

You have not defined the macros you're calling

Your example code is incomplete, I assume you are using 3rd-party helper macros/functions that you forgot to tell us about.

When asking for help you should also specify the NSIS and Windows versions you are using...