Invalid header signature

[nrk6208]

when i am trying to import data from some xls files

NPOI.POIFS.FileSystem.NotOLE2FileException: 'Invalid header signature; read 0x6320656C6261743C, expected 0xE11AB1A1E011CFD0 - Your file appears not to be a valid OLE2 document'

[carmonac]

I´m having the same problem, no feedback about this?

[Witchayanin]

I'm have same problem too

[MartinTopchyan]

@nrk6208 Hi , did you solve that problem?

[minskiter]

when i am trying to import data from some xls files

NPOI.POIFS.FileSystem.NotOLE2FileException: 'Invalid header signature; read 0x6320656C6261743C, expected 0xE11AB1A1E011CFD0 - Your file appears not to be a valid OLE2 document'

I am having the same problem,too. did you solve that porblem?

[nguyenvanbien95]

I am having the same problem, too. In my case, I have imported wrong library (NPOI) for Asp.net core project. I must switch library to dotnetcore.NPOI and it works!