You need to specify a width for the column which contains the equations. This will use "m" type for the row which will work. You can find a sample .lyx file attached which worked for me in Lyx 2.3 (Ubuntu 20.04)
** Attachment added: "Working eqnarray within tabular" https://bugs.launchpad.net/ubuntu/+source/lyx/+bug/151110/+attachment/5436391/+files/okTabular.lyx -- You received this bug notification because you are a member of Ubuntu Studio Bugs, which is subscribed to lyx in Ubuntu. Matching subscriptions: Ubuntu Studio Bugs https://bugs.launchpad.net/bugs/151110 Title: any multiline equation inside a table in Lyx 1.50 breaks Status in lyx package in Ubuntu: Confirmed Bug description: The following/attached trivial LyX file gives a bunch of errors when compiling. It simply contains any multline equation (eqnarray) inside a table (tabular) environment. The result of exporting latex also produces a broken latex file. Here is my lyx -version: LyX 1.5.0rc2 (Wed, Jun 27, 2007) Built on Jun 29 2007, 16:22:59 Configuration Host type: i586-pc-linux-gnu Special build flags: aiksaurus assertions pch concept-checks warnings use-aspell use-ispell C Compiler: gcc C Compiler LyX flags: C Compiler flags: -Wextra -Wall -g -O3 C++ Compiler: g++ (4.0.3) C++ Compiler LyX flags: C++ Compiler flags: -Wextra -Wall -g -O3 Linker flags: Linker user flags: Qt 4 Frontend: Qt 4 version: 4.1.2 Packaging: posix LyX binary dir: /usr/local/bin LyX files dir: /usr/local/share/lyx To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lyx/+bug/151110/+subscriptions -- Mailing list: https://launchpad.net/~ubuntustudio-bugs Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntustudio-bugs More help : https://help.launchpad.net/ListHelp
