Method not found: 'Void NPOI.SS.UserModel.IWorkbook.Write(System.IO.Stream)'.

[aminkosh]

Hi,
I have the following code:
`

using (var ms = new MemoryStream())
        {
            var mapper = new Mapper()
            {
                HasHeader = true
            };
            mapper.Save(ms, listDtos, "Auditlogs");
         }

`

but on mapper.Save(...) i get this error :
Method not found: 'Void NPOI.SS.UserModel.IWorkbook.Write(System.IO.Stream)'.

The error is appeared after i updated the "Npoi.Mapper" Version="3.5.1" to "Npoi.Mapper" Version="4.1.0"

Any help appreciated

[bobantopukov]

Hi,

I've the same issue with "Npoi.Mapper" Version="4.1.0".

Thanks

[flkeller]

If you have installed NPOI manually in version 2.6.0 you have to downgrade to 2.5.6. Afterwards it is working fine. Npoi has changed there Interfaces in the latest minor release

[black-and-tan-doge]

Downgrading NPOI to 2.5.6 fixed the issue for me.

[tonyqus]

@donnytian Can you release a new NPOI.Mapper version based on NPOI 2.6.0?

[skovalyova]

Same happens for me when using NPOI.Mapper 4.1.0

[curllion]

我也遇到这个问题啊，各种版本都试了，一直报这个错