This guide provides the full solution for the “Missing Map” error:
Missing map file check
Workshop collection setup
FastDL configuration
Map version mismatch
Windows + Linux fixes
Log analysis for debugging
What is the Missing Map error?
Main causes
Check the server map directory
Link Workshop collection
Configure FastDL
Map version mismatch issues
Windows & Linux fixes
Log analysis
Common errors
Recommended hosting
The player gets:
“Missing map: rp_downtown_v4c.bsp”
It means:
The map does not exist on the client
Workshop sync failed
Server hasn’t provided the map
Wrong or outdated map version
Map not uploaded to server
Wrong Workshop collection ID
Map not added to collection
autoexec.cfg not running
FastDL not configured
Path:
garrysmod/maps/mapname.bsp
If it's not there → instant Missing Map.
Add map to collection → get the ID → add to autoexec.cfg:
workshop_collection_id 3212345678
Add Steam API key:
sv_setsteamaccount "STEAM_API_KEY"
Without API key, maps will not sync.
server.cfg:
sv_downloadurl "http://example.com/fastdl/"
sv_allowdownload 1
sv_allowupload 1
FastDL structure:
/fastdl/maps/rp_downtown_v4c.bsp.bz2
If the server’s map version is different than the client’s → missing map.
Solution:
✔ Replace the map with the correct version
✔ Re-download from Workshop
icacls garrysmod\maps /grant Everyone:F /T
chmod -R 755 garrysmod/maps
chown -R steam:steam garrysmod/maps
Missing map
Workshop download failed
This means:
→ Wrong collection ID OR autoexec not working.
✔ Map not added to collection
✔ Collection set to private
✔ API key missing
✔ Wrong map version
Fast map loading
Zero sync errors
Full DDoS protection
NVMe Gen4 performance