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I would like to add a counter to a cell in a spreadsheet. &nbsp;We have a master spreadsheet that we open enter data into then save under another name, then someone will open the master sheet again enter new data and save under a different name, etc. &nbsp;I would like the sheet to get a unique sequntial identifier each time they enter new data. &nbsp;I've tried a simple counter however the value resets each time I run the code. 
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I would like to add a counter to a cell in a spreadsheet.  We have a master spreadsheet that we open enter data into then save under another name, then someone will open the master sheet again enter new data and save under a different name, etc.  I would like the sheet to get a unique sequntial identifier each time they enter new data.  I've tried a simple counter however the value resets each time I run the code. 

Sequntial counter

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