Mats Alm

Hi @nmanring , we will try to replicate this using the workbook you have uploaded. Will get back to you if we need more details.

This is fixed and will be released in the next version

The easiest way to fix this is to first do it in Excel and then pick the right string for `CenteredText` from the xml. Here is an example that worked...

@akhilHLD "&C" means "Center section" according to this documentation: https://learn.microsoft.com/en-us/dotnet/api/documentformat.openxml.spreadsheet.evenheader?view=openxml-3.0.1. Note that this is the documentation for EvenHeader, the OddHeader class does not have the same list of settings in...

Just to add a comment on this topic: we don't recommend to have multiple threads manipulating a single workbook. While this might work in some cases (as it obviously does...