How can i read the number of lines written - in spreadsheet array?

[Balaji_DP]

hello NI,

                       I am writing file as spreadsheet format continuously, contains date, time, chanel1, channel 2, channel 3..... etc.

i just want to know how many lines has been written after file write....

[Coq_Rouge]

You count the number of line termination char. Se example 

[Dennis_Knutson]

Why don't you simply use the Array Size function to get the number of rows in the array you are passing to the Write to Spreadsheet File? Use a shift register to append.