Created attachment 25467 [details] The test case to reproduce the bug We need a simple file to reproduce this bug. One data on the first cell "A1" Then apply a style to the cell "B3" and "B2". Then save the file. Finally try to read the content of the cell "B2"
Sorry, I wanted to say: Then apply a style to the cell "B1" and "C1". Then save the file. Finally try to read the content of the cell "B1"
I think the code writes out the Workbook and later on tries to continue writing to the Workbook, I think that is not supported right now and thus the XmlValueDisconnectedException is kind of expected here.