[Libreoffice-bugs] [Bug 141960] New: Headless mode started in parallel to visual mode shows visual errormessage and blocks

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=141960

            Bug ID: 141960
           Summary: Headless mode started in parallel to visual mode shows
                    visual errormessage and blocks
           Product: LibreOffice
           Version: 7.0.5.2 release
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Calc
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: liboffbugz at fabbrain.de

There's a Report.xlsm that has been created and edited in Excel. When I open
that xlsm in LibreOffice (visual mode), LibreOffice shows a warning message:
"Warning loading document Report.xlsm: The data could not be loaded completely
because the maximum number of columns per sheet was exceeded."
In visual mode this is no problem, I just click OK and the warning is gone.

In pure headless mode to convert that xlsm file to a png (`libreoffice
--headless --norestore --language=de --convert-to png Report.xlsm`) the
headless mode just works fine and creates a png file as expected.
Thanks for that converting function! :-)

In mixed mode (one LibreOffice UI is running plus a headless LibreOffice) the
headless mode is not fully headless anymore when there are warning messages:
1. Open a xlsx workbook (or start a new xlsx workbook) in LibreOffice with UI
2. Start LibreOffice in headless mode to convert a document (`libreoffice
--headless --norestore --language=de --convert-to png Report.xlsm`)
3. The headless call blocks and the warning message is visually shown.

Expected: the headless mode should never show a warning message even when there
is a visual LibreOffice instance started in parallel.

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