Looks like you've got a leak. Post your compile log if your still having this issue and I'll look it over or you can try Interlopers error checker:
http://www.interlopers.net/errors/
Thats not a security risk is it? Well, whatever. here it is
** Executing...
** Command: "c:\program files (x86)\steam\steamapps\jediryan209\sourcesdk\bin\orangebox\bin\vbsp.exe"
** Parameters: -game "c:\program files (x86)\steam\steamapps\jediryan209\half-life 2 episode two\ep2" "C:\my maps\gm_flatgrass_caves_beta5\gm_flatgrass_caves_beta5.vmf"
Valve Software - vbsp.exe (Jul 7 2010)
4 threads
materialPath: c:\program files (x86)\steam\steamapps\jediryan209\half-life 2 episode two\ep2\materials
Loading C:\my maps\gm_flatgrass_caves_beta5\gm_flatgrass_caves_beta5.vmf
***need to set $abovewater for material dev/dev_water2_cheap
***need to set $abovewater for material dev/dev_water2_cheap
Could not locate 'GameData' key in c:\program files (x86)\steam\steamapps\jediryan209\half-life 2 episode two\ep2\gameinfo.txt
fixing up env_cubemap materials on brush sides...
env_cubemap pointing at deleted brushside near (1024, 1024, 32)
env_cubemap pointing at deleted brushside near (1024, 1024, 32)
env_cubemap pointing at deleted brushside near (1024, 1024, 32)
ProcessBlock_Thread: 0...1...2...3...4...5...6...7...8...9...10 (0)
**** leaked ****
Entity light (640.00 -4992.00 -1801.00) leaked!
Processing areas...done (0)
Building Faces...done (0)
Chop Details...done (0)
Find Visible Detail Sides...done (0)
Merging details...done (0)
FixTjuncs...
PruneNodes...
WriteBSP...
done (1)
Creating default LDR cubemaps for env_cubemap using skybox materials:
skybox/sky_day02_07*.vmt
! Run buildcubemaps in the engine to get the correct cube maps.
Creating default HDR cubemaps for env_cubemap using skybox materials:
skybox/sky_day02_07*.vmt
! Run buildcubemaps in the engine to get the correct cube maps.
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) (128484 bytes)
Placing detail props : 0...1...2...3...4...5...6...7...8...9...10
Water found with no water_lod_control entity, creating a default one.
Compacting texture/material tables...
Reduced 808 texinfos to 409
Reduced 99 texdatas to 75 (4834 bytes to 3855)
Writing C:\my maps\gm_flatgrass_caves_beta5\gm_flatgrass_caves_beta5.bsp
3 seconds elapsed
** Executing...
** Command: "c:\program files (x86)\steam\steamapps\jediryan209\sourcesdk\bin\orangebox\bin\vvis.exe"
** Parameters: -game "c:\program files (x86)\steam\steamapps\jediryan209\half-life 2 episode two\ep2" "C:\my maps\gm_flatgrass_caves_beta5\gm_flatgrass_caves_beta5"
Valve Software - vvis.exe (Jul 7 2010)
4 threads
reading c:\my maps\gm_flatgrass_caves_beta5\gm_flatgrass_caves_beta5.bsp
reading c:\my maps\gm_flatgrass_caves_beta5\gm_flatgrass_caves_beta5.prt
LoadPortals: couldn't read c:\my maps\gm_flatgrass_caves_beta5\gm_flatgrass_caves_beta5.prt
** Executing...
** Command: "c:\program files (x86)\steam\steamapps\jediryan209\sourcesdk\bin\orangebox\bin\vrad.exe"
** Parameters: -game "c:\program files (x86)\steam\steamapps\jediryan209\half-life 2 episode two\ep2" "C:\my maps\gm_flatgrass_caves_beta5\gm_flatgrass_caves_beta5"
Valve Software - vrad.exe SSE (Jul 7 2010)
Valve Radiosity Simulator
4 threads
[Reading texlights from 'lights.rad']
[48 texlights parsed from 'lights.rad']
Loading c:\my maps\gm_flatgrass_caves_beta5\gm_flatgrass_caves_beta5.bsp
No vis information, direct lighting only.
Setting up ray-trace acceleration structure... Done (0.45 seconds)
6335 faces
29248218 square feet [4211743488.00 square inches]
0 Displacements
0 Square Feet [0.00 Square Inches]
573 direct lights
BuildFacelights: 0...1...2...3...4...5...6...7...8...9...10 (231)
Build Patch/Sample Hash Table(s).....Done<0.0890 sec>
FinalLightFace: 0...1...2...3...4...5...6...7...8...9...10 (3)
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 (108)
Writing leaf ambient...done
Ready to Finish
Object names Objects/Maxobjs Memory / Maxmem Fullness
------------ --------------- --------------- --------
models 50/1024 2400/49152 ( 4.9%)
brushes 336/8192 4032/98304 ( 4.1%)
brushsides 2083/65536 16664/524288 ( 3.2%)
planes 1626/65536 32520/1310720 ( 2.5%)
vertexes 9464/65536 113568/786432 (14.4%)
nodes 6633/65536 212256/2097152 (10.1%)
texinfos 409/12288 29448/884736 ( 3.3%)
texdata 75/2048 2400/65536 ( 3.7%)
dispinfos 0/0 0/0 ( 0.0%)
disp_verts 0/0 0/0 ( 0.0%)
disp_tris 0/0 0/0 ( 0.0%)
disp_lmsamples 0/0 0/0 ( 0.0%)
faces 6335/65536 354760/3670016 ( 9.7%)
hdr faces 0/65536 0/3670016 ( 0.0%)
origfaces 1054/65536 59024/3670016 ( 1.6%)
leaves 6684/65536 213888/2097152 (10.2%)
leaffaces 7005/65536 14010/131072 (10.7%)
leafbrushes 2688/65536 5376/131072 ( 4.1%)
areas 8/256 64/2048 ( 3.1%)
surfedges 31177/512000 124708/2048000 ( 6.1%)
edges 16923/256000 67692/1024000 ( 6.6%)
LDR worldlights 573/8192 50424/720896 ( 7.0%)
HDR worldlights 0/8192 0/720896 ( 0.0%)
leafwaterdata 1/32768 12/393216 ( 0.0%)
waterstrips 342/32768 3420/327680 ( 1.0%)
waterverts 0/65536 0/786432 ( 0.0%)
waterindices 5097/65536 10194/131072 ( 7.8%)
cubemapsamples 15/1024 240/16384 ( 1.5%)
overlays 0/512 0/180224 ( 0.0%)
LDR lightdata [variable] 4913032/0 ( 0.0%)
HDR lightdata [variable] 0/0 ( 0.0%)
visdata [variable] 0/16777216 ( 0.0%)
entdata [variable] 125569/393216 (31.9%)
LDR ambient table 6684/65536 26736/262144 (10.2%)
HDR ambient table 6684/65536 26736/262144 (10.2%)
LDR leaf ambient 37054/65536 1037512/1835008 (56.5%)
HDR leaf ambient 6684/65536 187152/1835008 (10.2%)
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] 1/12 ( 8.3%)
static props [variable] 1/1852 ( 0.1%)
pakfile [variable] 1413040/0 ( 0.0%)
physics [variable] 128484/4194304 ( 3.1%)
physics terrain [variable] 2/1048576 ( 0.0%)
Level flags = 0
Total triangle count: 14296
Writing c:\my maps\gm_flatgrass_caves_beta5\gm_flatgrass_caves_beta5.bsp
5 minutes, 42 seconds elapsed
** Executing...
** Command: Copy File
** Parameters: "C:\my maps\gm_flatgrass_caves_beta5\gm_flatgrass_caves_beta5.bsp" "c:\program files (x86)\steam\steamapps\jediryan209\half-life 2 episode two\ep2\maps\gm_flatgrass_caves_beta5.bsp"