id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
4751	Change of MAX_SIZE_LINEAR_TEARING	Rüdiger Franke	Rüdiger Franke	"Commit [https://github.com/OpenModelica/OMCompiler/commit/ccd5c42a2e2c293650884bf1292bcb56c02eec99 ccd5c42a] changed ""maxSizeLinearTearing=200 as default"".

This is bad for models using dense solvers, such as the default setting of the Cpp runtime. OpenModelica users need to be informed that the omc default was changed and that they may need to manually adjust maxSizeLinearTearing starting from OpenModelica 1.13. There should be a good reason for this.

What was the rationale behind the change?
Can you give me a link to the ticket or any other document discussing it?

The Cpp runtime uses the omc flag `--matrixFormat=dense|sparse` (see [https://openmodelica.org/doc/OpenModelicaUsersGuide/latest/omchelptext.html OMC flags]). The max tearing size could be adjusted depending on this setting.

Meanwhile, is it possible to revert commit [https://github.com/OpenModelica/OMCompiler/commit/ccd5c42a2e2c293650884bf1292bcb56c02eec99 ccd5c42a] until the consequences will have been discussed and documented?
"	defect	closed	critical	1.13.0	Backend		fixed		Patrick Täuber Francesco Casella Willi Braun Martin Sjölund