1.7.4 interface hang

[Kilinich]

I donno how I come to this but after I open scene and add some boxes algodoo stops respond on mouse clicks and only can undo.

Damn, I can't finish anything "big" in that 1.7.4
And I can't reproduce it 100%.. sorry.

Log:
00:06:23: Loading Algodoo/scenes/Moto-19.phz...
00:06:23: Loaded scene Algodoo/scenes/Moto-19.phz
00:06:28: -- Warning: FixJointEntity::AddToSimulation had body not in sim
00:06:47: Scene saved to Algodoo/scenes/Moto-20.phz
00:06:54: -- Warning: FixJointEntity::AddToSimulation had body not in sim
00:07:33: Overwriting old "Algodoo/scenes/Moto-20.phz"
00:07:33: Scene saved to Algodoo/scenes/Moto-20.phz
00:08:03: -- Warning: FixJointEntity::AddToSimulation had body not in sim
00:08:08: -- Warning: FixJointEntity::AddToSimulation had body not in sim
00:10:05: -- Warning: FixJointEntity::AddToSimulation had body not in sim
00:10:06: -- Warning: FixJointEntity::AddToSimulation had body not in sim
00:11:14: -- Warning: FixJointEntity::AddToSimulation had body not in sim
00:11:21: !! ERROR: Got an unconnected up code
00:11:21: !! ERROR: Got an unconnected up code
00:11:22: !! ERROR: Got an unconnected up code
00:11:24: -- Warning: FixJointEntity::AddToSimulation had body not in sim
00:11:25: !! ERROR: Got an unconnected up code
00:11:28: -- Warning: FixJointEntity::AddToSimulation had body not in sim
00:11:29: -- Warning: FixJointEntity::AddToSimulation had body not in sim
00:11:31: -- Warning: FixJointEntity::AddToSimulation had body not in sim
00:11:32: !! ERROR: Got an unconnected up code
00:11:33: !! ERROR: Got an unconnected up code
00:11:34: !! ERROR: Got an unconnected up code
00:11:34: !! ERROR: Got an unconnected up code
00:11:35: !! ERROR: Got an unconnected up code
00:11:36: !! ERROR: Got an unconnected up code
00:11:36: !! ERROR: Got an unconnected up code
00:11:36: !! ERROR: Got an unconnected up code
00:11:37: !! ERROR: Got an unconnected up code
00:11:38: !! ERROR: Got an unconnected up code
00:11:38: !! ERROR: Got an unconnected up code
00:11:38: !! ERROR: Got an unconnected up code
00:11:39: !! ERROR: Got an unconnected up code
00:11:39: !! ERROR: Got an unconnected up code
00:11:39: -- Warning: FixJointEntity::AddToSimulation had body not in sim
00:11:40: !! ERROR: Got an unconnected up code
00:11:41: !! ERROR: Got an unconnected up code
00:11:42: !! ERROR: Got an unconnected up code
00:11:42: !! ERROR: Got an unconnected up code
00:11:52: !! ERROR: Got an unconnected up code
00:12:00: !! ERROR: Got an unconnected up code
00:12:14: !! ERROR: Got an unconnected up code

[emilk]

A serious problem indeed - we're looking into it. If anyone can help us reproduce this we would be very thankful!