Using emu$8086$ exe, can you tell me why i get this error code :

file does not exist:

C:$\backslash$emu$8086\backslash$vdrive$\backslash$

$\backslash$emu$8086\backslash$vdrive$\backslash$C$\backslash$inventory$.$txt

interrupt error: $21$h$/3$Dh : cannot open file.

When this is my code:

$.$model small

$.$stack $100$h

$.$data

; Memory blocks to simulate the structure

manufacturer db $20$ ; Maximum input size db $20$ dup$(0)$ ; Buffer for input model db $20$ db $20$ dup$(0)$ color db $20$ db $20$ dup$(0)$ engine$\_$size db $10$ ; Smaller buffer for engine size db $10$ dup$(0)$ doors db $2$ db $2$ dup$(0)$ filename db $\text{'}$C:$\backslash$emu$8086\backslash$vdrive$\backslash$C$\backslash$inventory$.$txt$\text{'},0$ continue$\_$buffer db $2,2$ dup$(0)$ ; Buffer for Y$/$N prompt input prompt$\_$msg$1$ db 'Enter manufacturer: $$\text{'}$ prompt$\_$msg$2$ db 'Enter model: $$\text{'}$ prompt$\_$msg$3$ db 'Enter color: $$\text{'}$ prompt$\_$msg$4$ db 'Enter engine size: $$\text{'}$ prompt$\_$msg$5$ db 'Enter number of doors: $$\text{'}$ continue$\_$prompt db 'Add more inventory $($Y$/$N$)?$ $$\text{'}$ newline db $0$Dh$,0$Ah$,\text{'}$$$\text{'}$ ; Newline characters to move to next line done$\_$msg db $\text{'}***$ Awesome Auto Lot Inventory file has been processed $***\text{'},0$Dh$,0$Ah$,\text{'}$$$\text{'}$ ;For file reading and writing file$\_$handle dw $?$ bytes$\_$written dw $?$ buffer$\_$size db $70$ read$\_$buffer db $70$ dup$(0).$code main: ; Initialize data segment mov ax$,$ @data mov ds$,$ ax ;Create file mov ah$,3$Ch ;Create file lea dx$,$ filename mov cx$,0$ int $21$h mov file$\_$handle, ax ;save file handle ; Main loop main$\_$loop: call get$\_$auto$\_$info ; Call procedure to get automobile information call write$\_$to$\_$file ; Ask user if they want to add more inventory lea dx$,$ continue$\_$prompt mov ah$,09$h int $21$h ; Get user input for continue prompt $($Y$/$N$)$ lea dx$,$ continue$\_$buffer mov ah$,0$Ah int $21$h ; Check if the user entered $\text{'}$N$\text{'}$ mov al$,$ continue$\_$buffer $+2$ ; Get the first character entered $(\text{'}$Y$\text{'}$ or $\text{'}$N$\text{'})$ cmp al$,\text{'}$N$\text{'}$ je close$\_$file ; If user entered $\text{'}$N$\text{'},$ jump to done lea dx$,$ newline ; If yes, move next prompt to next line mov ah$,09$h int $21$h jmp main$\_$loop ;If not, continue close$\_$file: mov ah$,3$Eh mov bx$,$ file$\_$handle int $21$h ; lea dx$,$ done$\_$msg ;print done message mov ah$,09$h int $21$h ;open file to read mov al$,2$ ; Open file function mov dx$,$ offset filename mov ah$,3$Dh ; Read and write int $21$h mov file$\_$handle, ax ; Save the file handle read$\_$loop: call read$\_$from$\_$file ;read structure from file cmp al$,0$ ;check if end of file je done$\_$reading ;if yes, jump to done ;Print structure call print$\_$auto$\_$info ;loop to read more data jmp read$\_$loop done$\_$reading: ;Close file mov ah$,3$Eh mov bx$,$ file$\_$handle int $21$h ;end prog mov ah$,4$Ch int $21$h ; Procedure to collect automobile information get$\_$auto$\_$info proc ; Prompt for manufacturer lea dx$,$ prompt$\_$msg$1$ mov ah$,09$h int $21$h ; User input for manufacturer lea dx$,$ manufacturer mov ah$,0$Ah int $21$h ; Move to the next line after user input lea dx$,$ newline mov ah$,09$h int $21$h ; Prompt for model lea dx$,$ prompt$\_$msg$2$ mov ah$,09$h int $21$h ; User input for model lea dx$,$ model mov ah$,0$Ah int $21$h ; Move to the next line after user input lea dx$,$ newline mov ah$,09$h int $21$h ; Prompt for color lea dx$,$ prompt$\_$msg$3$ mov ah$,09$h int $21$h ; User input for color lea dx$,$ color mov ah$,0$Ah int $21$h ; Move to the next line after user input lea dx$,$ newline mov ah$,09$h int $21$h ; Prompt for engine size lea dx$,$ prompt$\_$msg$4$ mov ah$,09$h int $21$h ; User input for engine size lea dx$,$ engine$\_$size mov ah$,0$Ah int $21$h ; Move to the next line after user input lea dx$,$ newline mov ah$,09$h int $21$h ; Prompt for number of doors lea dx$,$ prompt$\_$msg$5$ mov ah$,09$h int $21$h ; User input for number of doors lea dx$,$ doors mov ah$,0$Ah int $21$h ; Move to the next line after user input lea dx$,$ newline mov ah$,09$h int $21$h ret get$\_$auto$\_$info endp ;Write structure to file write$\_$to$\_$file proc ; Prepare the combined data for writing lea si$,$ manufacturer ; Start with manufacturer lea di$,$ read$\_$buffer ; Point to buffer for writing mov cx$,20$ ; Size of manufacturer rep movsb ; Copy manufacturer to buffer lea si$,$ model ; Next, copy