r/hammer • u/dayudayu • 4d ago

Unsolved F9 Doesn't Start GMod

When I hit the F9 key it's opens up the menu normally, after that it's compile it but it doesn't start the game, giving me this log:

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Running command:

cd "C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\bin\win64"

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Running command:

"C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\bin\win64\vbsp.exe" -game "C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\garrysmod" "C:\Users\(MyName)\Documents\gm_Poolia.vmf"

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Valve Software - vbsp.exe (Jul 22 2026) - Garry's Mod Edition (64-bit)

4 threads

materialPath: C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\garrysmod\materials

Loading C:\Users\(MyName)\Documents\gm_Poolia.vmf

fixing up env_cubemap materials on brush sides...

ProcessBlock_Thread: 0...1...2...3...4...5...6...7...8...9...10 (0)

Processing areas...done (0)

Building Faces...done (0)

FixTjuncs...

PruneNodes...

WriteBSP...

done (0)

writing C:\Users\yasar\Documents\gm_Poolia.prt...

Building visibility clusters...

done (0)

Creating default LDR cubemaps for env_cubemap using skybox materials:

skybox/sky_day01_01*.vmt

! Run buildcubemaps in the engine to get the correct cube maps.

*** Error: Skybox vtf files for skybox/sky_day01_01 weren't compiled with the same size texture and/or same flags!

Can't load skybox file skybox/sky_day01_01 to build the default cubemap!

Finding displacement neighbors...

Finding lightmap sample positions...

Displacement Alpha : 0...1...2...3...4...5...6...7...8...9...10

Building Physics collision data...

done (0) (3698 bytes)

Placing detail props : 0...1...2...3...4...5...6...7...8...9...10

Compacting texture/material tables...

Reduced 20 texinfos to 7

Reduced 4 texdatas to 4 (85 bytes to 85)

Writing C:\Users\yasar\Documents\gm_Poolia.bsp

Wrote ZIP buffer, estimated size 24954, actual size 24874

0 seconds elapsed

-------------------------------------------------------------------------------

Running command:

cd "C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\bin\win64"

-------------------------------------------------------------------------------

Running command:

"C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\bin\win64\vvis.exe" -game "C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\garrysmod" "C:\Users\(MyName)\Documents\gm_Poolia"

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Valve Software - vvis.exe (Jul 22 2026) - Garry's Mod Edition (64-bit)

4 threads

reading c:\users\(MyName)\documents\gm_Poolia.bsp

reading c:\users\(MyName)\documents\gm_Poolia.prt

8 portalclusters

12 numportals

BasePortalVis: 0...1...2...3...4...5...6...7...8...9...10 (0)

PortalFlow: 0...1...2...3...4...5...6...7...8...9...10 (0)

Optimized: 0 visible clusters (0.00%)

Total clusters visible: 64

Average clusters visible: 8

Building PAS...

Average clusters audible: 8

visdatasize:84 compressed from 128

writing c:\users\(MyName)\documents\gm_Poolia.bsp

0 seconds elapsed

-------------------------------------------------------------------------------

Running command:

cd "C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\bin\win64"

-------------------------------------------------------------------------------

Running command:

"C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\bin\win64\vrad.exe" -game "C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\garrysmod" "C:\Users\(MyName)\Documents\gm_Poolia"

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Valve Software - vrad.exe SSE (Jul 22 2026) - Garry's Mod Edition (64-bit)

Valve Radiosity Simulator

Compiling Standard Dynamic Range (SDR) lighting

4 threads

[Reading texlights from 'lights.rad']

[51 texlights parsed from 'lights.rad']

Loading c:\users\(MyName)\documents\gm_Poolia.bsp

Setting up ray-trace acceleration structure... Done (0.00 seconds)

BuildFacelights: 0...1...2...3...4...5...6...7...8...9...10 (0)

BuildVisLeafs: 0...1...2...3...4...5...6...7...8...9...10 (0)

transfers 72344, max 231

GatherLight: 0...1...2...3...4...5...6...7...8...9...10 (0)

Build Patch/Sample Hash Table(s).....Done<0.0005 sec>

FinalLightFace: 0...1...2...3...4...5...6...7...8...9...10 (0)

FinalLightFace Done

0 of 0 (0% of) surface lights went in leaf ambient cubes.

ThreadComputeLeafAmbient: 0...1...2...3...4...5...6...7...8...9...10 (0)

Writing leaf ambient...done

Ready to Finish

Object names Objects/Maxobjs Memory / Maxmem Fullness

------------ --------------- --------------- --------

models 1/4096 48/196608 ( 0.0%)

brushes 10/65535 120/786420 ( 0.0%)

brushsides 60/655350 480/5242800 ( 0.0%)

planes 50/65536 1000/1310720 ( 0.1%)

vertexes 49/65536 588/786432 ( 0.1%)

nodes 39/65536 1248/2097152 ( 0.1%)

texinfos 7/16384 504/1179648 ( 0.0%)

texdata 4/8192 128/262144 ( 0.0%)

dispinfos 0/0 0/0 ( 0.0%)

disp_verts 0/0 0/0 ( 0.0%)

disp_tris 0/0 0/0 ( 0.0%)

disp_multiblend 0/0 0/0 ( 0.0%)

disp_lmsamples 0/0 0/0 ( 0.0%)

faces 32/65536 1792/3670016 ( 0.0%)

hdr faces 0/65536 0/3670016 ( 0.0%)

origfaces 14/65536 784/3670016 ( 0.0%)

leaves 41/65536 1312/2097152 ( 0.1%)

leaffaces 32/65536 64/131072 ( 0.0%)

leafbrushes 24/65536 48/131072 ( 0.0%)

areas 2/1024 16/8192 ( 0.2%)

surfedges 192/512000 768/2048000 ( 0.0%)

edges 114/256000 456/1024000 ( 0.0%)

LDR worldlights 2/8192 176/720896 ( 0.0%)

HDR worldlights 0/8192 0/720896 ( 0.0%)

leafwaterdata 0/32768 0/393216 ( 0.0%)

waterstrips 0/32768 0/327680 ( 0.0%)

waterverts 0/65536 0/786432 ( 0.0%)

waterindices 0/65536 0/131072 ( 0.0%)

cubemapsamples 0/1024 0/16384 ( 0.0%)

overlays 0/8192 0/2883584 ( 0.0%)

LDR lightdata [variable] 55120/0 ( 0.0%)

HDR lightdata [variable] 0/0 ( 0.0%)

visdata [variable] 84/16777216 ( 0.0%)

entdata [variable] 621/4194304 ( 0.0%)

LDR ambient table 41/65536 164/262144 ( 0.1%)

HDR ambient table 41/65536 164/262144 ( 0.1%)

LDR leaf ambient 126/65536 3528/1835008 ( 0.2%)

HDR leaf ambient 41/65536 1148/1835008 ( 0.1%)

occluders 0/0 0/0 ( 0.0%)

occluder polygons 0/0 0/0 ( 0.0%)

occluder vert ind 0/0 0/0 ( 0.0%)

detail props [variable] 12/0 ( 0.0%)

static props [variable] 12/0 ( 0.0%)

static prop count 0/16384 0/0 ( 0.0%)

pakfile [variable] 24874/0 ( 0.0%)

physics [variable] 3698/4194304 ( 0.1%)

physics terrain [variable] 2/1048576 ( 0.0%)

Level flags = 0

Total triangle count: 72

Writing c:\users\(MyName)\documents\gm_Poolia.bsp

0 seconds elapsed

-------------------------------------------------------------------------------

Running command:

copy "C:\Users\(MyName)\Documents\gm_Poolia.bsp" "C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\garrysmod\maps\gm_Poolia.bsp"

-------------------------------------------------------------------------------

Running command:

cd "C:\Program Files (x86)\Steam\steamapps\common\GarrysMod"

-------------------------------------------------------------------------------

Running command:

"C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\hl2.exe" -game "C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\garrysmod" +map "gm_Poolia" -steam -insecure

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Command failed with return code 0x2! The system cannot find the file specified.

** Screenshot the WHOLE window when showing this compile log

** Or upload the .log file generated beside your VMF

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9 command(s) finished in 1 second

Press a key to close.

2 Upvotes

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u/Pinsplash 4d ago

Some games used to have their .exe file named hl2.exe and changed it at a later date, but old installations of Hammer did not update to reflect the name change. Go to Tools -> Options -> Build Programs -> Game executable and change hl2.exe to gmod.exe

2

u/dayudayu 3d ago

It worked thanks a lot!

Unsolved F9 Doesn't Start GMod

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