https://issues.apache.org/bugzilla/show_bug.cgi?id=54399
--- Comment #1 from Dominik Stadler <dominik.stad...@gmx.at> --- The error happens at a point where the external references are resolved in order to adjust all formulas/references for the new sheet-name. FormularParser.createAreaRefParseNode() tries to read the external sheet index, but does not find the referenced external sheets and thus ends up using -1. I still lack details of how it is supposed to work, though, to say if this is somehow expected here or an invalid .xlsx or really a bug in POI... -- You are receiving this mail because: You are the assignee for the bug. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@poi.apache.org For additional commands, e-mail: dev-h...@poi.apache.org