Emu gridshell formation solver error

I’ve few post supports and want to estimate force acting on each of them after hanging cables of specified weight (load). It is basic definition from Emu gridshell formation example for perpendicular grid but I’ve got error on relaxation solver after changing load point from support to middle of each cable.
Is it possible to estimate those forces with Emu? And if it is than what am I doing wrong?

Emu original example: Emu_ElasticGridshellFormation.gh (39.6 KB)
Changed version: Emu_ElasticGridshellFormation_2.3dm (582.4 KB) Emu_ElasticGridshellFormation_2.gh (46.5 KB)