STOCK ITEMS NUMBERING DURING INVOICE ENTRY

DEAR DEVELOPERS. Is it possible to number the stock items while invoicing in Tally during purchase & sales invoice entry ?
Like
1. Item -1
2. Item-2
3. Item-3
Simply whenever we will select a item from stock & put enter it would assingn serially number like- 1, 2, 3. Please give full code.

Thanks in advance.

 

[#Line : EI ColumnOne]
Option: Global EI ColumnOne

[!Line: Global EI ColumnOne]
add: fields: before:VCH ItemTitle : VCH SlNO
[field: vch slno]
use:name field
setas: "sl no"
width :8
style:normal bold
Skip : yes

[#Line : EI InvInfo]
Option : Global EI InvInfo

[#Line : CI InvInfo]
Option : Global EI InvInfo

[!Line: Global EI InvInfo]
add: fields:before: VCH StockItem : vchslno1
[field:vchslno1]
Set as:$$Line
Skip : yes

 

This is showing an error -
"Error T0027: The attribute definition started without a valid description."

 

[#Line : EI ColumnOne]
Option : Global EI ColumnOne1

[!Line : Global EI ColumnOne1]
add : fields: before:VCH ItemTitle : VCH SlNO
[field : vch slno]
use : name field
setas : "SL"
Align : Centre
width : 5
style : Small bold
Skip : yes

[#Line : EI InvInfo]
Option : Global EI InvInfo1

[#Line : CI InvInfo]
Option : Global EI InvInfo1

[!Line : Global EI InvInfo1]
add : fields:before: VCH StockItem : vchslno1
[field : vchslno1]
Set as : $$Line
Align : Centre
Border : Thin Left Right
Width : 5
Skip : Yes

 

Thank you very much for your valueable time sparing for this Coding Sir. But a little bit bug is still there. After entering last item, when we press enter to end stock entry & put other ledgers like tax allocation like cgst , sgst & round off etc under it. It is coming in the sl no. Field. Please check it out.

 

Please check this pic.