MI34 - Sequential file C:\phyinv34_38 cannot be opened

Hi SAP Gurus,

I want to use MI34 to enter count from file.

I read the SAP information about this tcode.

I created a file with the fields of BISEG.

I saved the original file (Excel) in txt (with tab).

I modified the logical path file to read the good file.

But, I've always this message.

Different threads about this problem but with no solution.

In test mode, we have no problem because we update a SAP table T159I.

Please, give me the good reason of this message.

Is is necessary to have all fields in the file from BISEG ?

And, of course, advices of the best practices of this tcode ...

I have the same message with MI39 ...

Thanks

Lionel MARTIN