Strange, I tried it again and now it worked fine.
But anyway, after a short while 0ad crashed:
ERROR: Failed to find matching prop point called "antler" in model "art/meshes/skeletal/deer_mesh.dae" for actor "fauna/deer.xml"
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'fauna_sheep'
ERROR: Failed to load entity template 'iber_dock'
ERROR: CXeromyces: Failed to find XML file art/actors/props/special/eyecandy/water_waves.xml
ERROR: CObjectManager::FindObjectBase(): Cannot find object 'props/special/eyecandy/water_waves.xml'
ERROR: CXeromyces: Failed to find XML file art/actors/props/special/eyecandy/water_waves.xml
ERROR: CObjectManager::FindObjectBase(): Cannot find object 'props/special/eyecandy/water_waves.xml'
ERROR: CXeromyces: Failed to find XML file art/actors/props/special/eyecandy/water_waves.xml
ERROR: CObjectManager::FindObjectBase(): Cannot find object 'props/special/eyecandy/water_waves.xml'
ERROR: CXeromyces: Failed to find XML file art/actors/props/special/eyecandy/water_waves.xml
ERROR: CObjectManager::FindObjectBase(): Cannot find object 'props/special/eyecandy/water_waves.xml'
ERROR: CXeromyces: Failed to find XML file art/actors/props/special/eyecandy/water_waves.xml
ERROR: CObjectManager::FindObjectBase(): Cannot find object 'props/special/eyecandy/water_waves.xml'
ERROR: CXeromyces: Failed to find XML file art/actors/props/special/eyecandy/water_waves.xml
ERROR: CObjectManager::FindObjectBase(): Cannot find object 'props/special/eyecandy/water_waves.xml'
ERROR: CXeromyces: Failed to find XML file art/actors/props/special/eyecandy/water_waves.xml
ERROR: CObjectManager::FindObjectBase(): Cannot find object 'props/special/eyecandy/water_waves.xml'
ERROR: CXeromyces: Failed to find XML file art/actors/props/special/eyecandy/water_waves.xml
ERROR: CObjectManager::FindObjectBase(): Cannot find object 'props/special/eyecandy/water_waves.xml'
ERROR: CXeromyces: Failed to find XML file art/actors/props/special/eyecandy/water_waves.xml
ERROR: CObjectManager::FindObjectBase(): Cannot find object 'props/special/eyecandy/water_waves.xml'
ERROR: CXeromyces: Failed to find XML file art/actors/props/special/eyecandy/water_waves.xml
ERROR: CObjectManager::FindObjectBase(): Cannot find object 'props/special/eyecandy/water_waves.xml'
ERROR: CXeromyces: Failed to find XML file art/actors/props/special/eyecandy/water_waves.xml
ERROR: CObjectManager::FindObjectBase(): Cannot find object 'props/special/eyecandy/water_waves.xml'
ERROR: CXeromyces: Failed to find XML file art/actors/props/special/eyecandy/water_waves.xml
ERROR: CObjectManager::FindObjectBase(): Cannot find object 'props/special/eyecandy/water_waves.xml'
GAME STARTED, ALL INIT COMPLETE
EntityHandles.cpp(116): Assertion failed: "g_EntityManager.m_entities[m_handle].m_refcount"
udbg_bfd_init: loading symbols from ./pyrogenesis_dbg.
Assertion failed: "g_EntityManager.m_entities[m_handle].m_refcount"
Location: EntityHandles.cpp:116 (operator CEntity*)
Call stack:
(0x084c3500) ldbg.cpp:99 debug_DumpStack(wchar_t*, unsigned int, void*, char const*)
(0x0848c444) debug.cpp:316 debug_BuildErrorMessage(wchar_t const*, char const*, int, char const*, void*, char const*, ErrorMessageMem*)
(0x0848c8f4) debug.cpp:437 debug_DisplayError(wchar_t const*, unsigned int, void*, char const*, char const*, int, char const*, unsigned char*)
(0x0848c9d4) debug.cpp:515 debug_OnAssertionFailure(char const*, unsigned char*, char const*, int, char const*)
(0x082b8cd1) EntityHandles.cpp:116 HEntity::operator CEntity*() const
(0x082f6720) Aura.cpp:52 CAura::Update(int)
(0x082a4f29) Entity.cpp:450 CEntity::Update(int)
(0x082c9402) EntityManager.cpp:448 CEntityManager::UpdateAll(int)
(0x08302803) Simulation.cpp:179 CSimulation::Simulate()
(0x08302c27) Simulation.cpp:107 CSimulation::Update(double)
(0x082440b6) Game.cpp:237 CGame::Update(double, bool)
(0x081f39ba) main.cpp:273 Frame
(0x081f3e75) main.cpp:400 RunGameOrAtlas
(0x081f3f0f) main.cpp:416 main
(0xb7602705) /lib/libc.so.6:0 __libc_start_main
(0x081f3081) start.S:122 _start
errno = 0 (?)
OS error = ?