Reset the For loop

[El-Awny]

I am Reading a Spreadsheet File from my computer and editing it Using For loop, I have a problem when i run the program more than once i got an error

For Example I have a sheet with 50 columns
When i run the program at the first time and it works well .. at the second time i run the program, it starts to read from column 51 to 100 and actually there is no data to read in the sheet so i got an error and the program stops.
I have to change something in the VI or reopening the vi to work again

How can i reset the for loop to read from first column again ?

[aputman · Accepted solution]

Please post your code.  It sounds like you have an uninitialized shift register that holds the column index. 

[El-Awny]

Yes, You are right.
I didn't notice that i didn't put a constant 0 wired to the shift register
Thanks  a lot.