diff --git a/FSHa.asm b/FSHa.asm
index 5e23f86..1f0d98c 100644
--- a/FSHa.asm
+++ b/FSHa.asm
@@ -26,7 +26,7 @@ Input:
  LD   DE, 0
  LD   DE, FshCmdInptSize
  CALL inputstr
- 
+
  CALL _NewLine
 
 Decode:
@@ -55,17 +55,19 @@ Exit:
 PS1: .DB "FSH> ",0
 FshFlags: .DB %00000000
 ; 0: Debug Flag
-; 1: Error Flag (Unused)
+; 1: Error Flag
 ; 2: Program Flag
 
-
-#include "includes/String.asm"
-#include "includes/Byte.asm"
 #include "includes/Math.asm"
-#include "includes/FshVar.asm"
-#include "includes/FshCmd.asm"
+#include "includes/Byte.asm"
 #include "includes/Char.asm"
 #include "includes/Cursor.asm"
-#include "includes/Input.asm"
+
+#include "includes/FshCmd.asm"
 #include "includes/Err.asm"
+#include "includes/String.asm"
+
+#include "includes/FshVar.asm"
+
+#include "includes/Input.asm"
 .end
diff --git a/bin/FSHa.8xp b/bin/FSHa.8xp
index 5f4b27c..c1b2cb5 100644
Binary files a/bin/FSHa.8xp and b/bin/FSHa.8xp differ
diff --git a/includes/Err.asm b/includes/Err.asm
index fa3fe2f..8d1b47c 100644
--- a/includes/Err.asm
+++ b/includes/Err.asm
@@ -1,17 +1,46 @@
+;;ErrCatch
+;;Checks err bit and jp to err route
+ErrCatch:
+ ld hl, FshFlags
+ bit 1, (hl)
+ jp nz, ErrRoute
+ jp Fin
+
 ;;ErrRoute
 ;;Routes err codes.
-;;Outputs:
-;; Jp to loc for err func
 ErrRoute:
+ ld hl, FshFlags
+ res 1, (hl)
+
  ld hl, FshCmdErrCode
 
  ld de, ErrCmdNotFoundo
  call bytecmp
  jp z, ErrCmdNotFoundf
 
+ ld de, ErrOutOfBoundso
+ call bytecmp
+ jp z, ErrOutOfBoundsf
+
  jp ErrDefault
 
 
+;;ErrSet
+;;Sets all things relating to Err codes
+;; Inputs:
+;; HL: Err____o
+ErrSet:
+ push hl
+  ld a, (hl)
+  ld hl, FshCmdErrCode
+  ld (hl), a
+  ld hl, FshFlags
+  set 1, (hl)
+ pop hl
+ ret
+
+;;ERR FUNCS
+
 ErrCmdNotFoundo: .db $01
 ErrCmdNotFoundf:
  ld hl, ErrCmdNotFoundt
@@ -20,10 +49,18 @@ ErrCmdNotFoundf:
  call _PutS
  call _NewLine
  jp Fin
-ErrCmdNotFoundt: .db "ERR: No Command: ", 0
+ErrCmdNotFoundt: .db "error: No Command:", 0
+
+ErrOutOfBoundso: .db $02
+ErrOutOfBoundsf:
+ ld hl, ErrOutOfBoundst
+ call _PutS
+ call _NewLine
+ jp Fin
+ErrOutOfBoundst: .db "error: Out Of Bounds", 0
 
 ErrDefault:
  ld hl, ErrDefaultt
  call _PutS
  jp Exit
-ErrDefaultt: .db "ERR: Default; Exit", 0
+ErrDefaultt: .db "error: Default; Exit", 0
diff --git a/includes/FshVar.asm b/includes/FshVar.asm
index 11d3c8c..c6b2941 100644
--- a/includes/FshVar.asm
+++ b/includes/FshVar.asm
@@ -4,12 +4,15 @@
 ;;  HL: 16b
 ;;  DE: Destination Word Relitive to FshVars
 fshvarset:
+ push bc 
+  ld bc, FshVarsSize / 2 - 1
+  call cpBCDE
+ pop bc
+ jr c, fshvarsetOOBException
+
  push bc
  push de
  push hl
-  ld bc, FshVarsSize / 2
-  call cpBCDE
-  jr c, fshvarsetOOBException
   ld bc, FshVars
   ex de, hl
    add hl, hl
@@ -17,12 +20,18 @@ fshvarset:
   ld (hl), e
   inc hl
   ld (hl), d
-fshvarsetOOBException:
  pop hl
  pop de
  pop bc
  ret
 
+fshvarsetOOBException:
+ push hl
+  ld hl, ErrOutOfBoundso
+  call ErrSet
+ pop hl
+ ret
+
 ;;; fshvarget [Words]
 ;;  Gets a Word in FshVars.
 ;; Inputs:
@@ -30,12 +39,15 @@ fshvarsetOOBException:
 ;; Outputs:
 ;;  HL: Word in (DE)
 fshvarget:
+ push bc 
+  ld bc, FshVarsSize / 2 - 1
+  call cpBCDE
+ pop bc
+ jr c, fshvargetOOBException
+
  push bc
  push de
   ld hl, 0
-  ld bc, FshVarsSize / 2
-  call cpBCDE
-  jr c, fshvargetOOBException
   ld bc, FshVars
   ex de, hl
    add hl, hl
@@ -44,17 +56,29 @@ fshvarget:
   inc hl
   ld d, (hl)
   ex de, hl
-fshvargetOOBException:
  pop de
  pop bc
  ret
 
+fshvargetOOBException:
+ push hl
+  ld hl, ErrOutOfBoundso
+  call ErrSet
+ pop hl
+ ret
+
 ; fshvarcpy [Bytes]
 ;;  Copies a word.
 ;; Inputs:
 ;;  HL: Byte pointer
 ;;  DE: Destination
 fshvarcpy:
+ push bc 
+  ld bc, FshVarsSize / 2 - 1
+  call cpBCDE
+ pop bc
+ jr c, fshvarcpyOOBException
+
  push bc
  push de
  push hl
@@ -73,12 +97,18 @@ fshvarcpy:
    inc hl
   ld a, (de)
   ld (hl), a
-fshvarcpyOOBException:
  pop hl
  pop de
  pop bc
  ret
 
+fshvarcpyOOBException:
+ push hl
+  ld hl, ErrOutOfBoundso
+  call ErrSet
+ pop hl
+ ret
+
 ; fshvarfill
 ;;  fills fshvars with word
 ;; Inputs:
diff --git a/includes/commands/SET.asm b/includes/commands/SET.asm
index 25b646e..159eaa8 100644
--- a/includes/commands/SET.asm
+++ b/includes/commands/SET.asm
@@ -57,7 +57,7 @@ fshcmdSETfExe:
  ld l, b
  call fshvarset
  call _NewLine
- jp Fin 
+ jp ErrCatch 
 
 fshcmdSETfInputBuffer: .db $00,$00,$00,$00
 fshcmdSETfDIndex: .db "Index= ", 0