Fixing the "Can't find filesystemopendialog.dll" error
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This is an error that occures when starting the Hammer World Editor, and can be fixed by following the guide below.
Fixing the error
The error this page is all about is caused by not having content precached yet. Usually playing the game you're mapping for should fix this error, but sometimes it might not fix it. If you're experiencing this error, you should always do the following:
- Play half-life 2, Half-life 2: DeathMatch and Counter-strike: Source.
- Play the mod you're mapping for (if you're mapping for a mod).
check the GameInfo.txt file. Some mods use a certain game to run, and may not be set up properly. Also, when ToolsAppId is set to AppId, you may experience this error as well.