read excel cells by name


I'm trying to read a cell value using function excelreadcellsbyname but i'm getting below error when trying to read a cell value. 

can anyone please  help in fixing this issue

input : excelreadcellsbyname(640958, { 2 }, { "F9" }),

output : Expression evaluation error at function 'excelreadcellsbynumber': The column Value of long (+ve) position doesn't exist in table INVFI

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