XLR8 error: writing in file with graph sheets

[JensG69]

Hi Daniel,

thanks for hint. I probably will have a look at it when becomes part of the next NPOI relase version. Currently it is just a commit on the way to NPOI 2.6.1, I hope you understand that we will not build a XLR8 release on this inbetween commit.

Thank you for your patience and best regards,

DATA AHEAD