Commandline-Arguments

Command Line Launch Arguments

This section details the various command line arguments accepted by the client.

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Settings Overrides

The following options can be provided to override values present in settings.json

-settings

Number of arguments: 1

Expected format:-settings "/absolute/path/to/settings.json"

Default when omitted: ./settings.json

Example: -settings "/home/tazuo/settings.json"

Function:

Instructs the client to load a specific configuration file.

For more information, please see this page

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-username

Number of arguments: 1

Expected format:-username your_username

Example: -username SomeoneAwsome

Function:

Sets the username for the current session

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-password

Number of arguments: 1

Expected format:-password your_password

Function:

Sets the password for the current session

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-password_enc

Number of arguments: 1

Expected format:-password_enc "your_encrypted_password"

Example: -password "1-DEADBEEF"

Function:

Sets the password for the current session.

Note that the given password must already be encrypted.

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-ip

Number of arguments: 1

Expected format:-ip "server_ip"

Example: -ip "123.12.12.1"

Function:

Sets the server IP for the current session

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-port

Number of arguments: 1

Expected format:-port 0-65535

Example: -port 2593

Function:

Sets the server’s, port (i.e., the destination port the client should connect to) for the current version.

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-filesoverride / -uofilesoverride

Number of arguments: 1

Expected format:-filesoverride "/absolute/path/to/override.xml"

Example: -filesoverride "/home/tazuo/uofiles_override.xml"

Function:

Allows overriding UO game files.

The file given as an argument will be parsed in a key-value manner (similar to an ini file) with each row representing an overriden file.

An example of such override file could be:

Gumpart.mul=/home/tazuo/gumps/awsome-gumps.mul
skills.mul=/home/tazuo/skills/secret-skills.mul

[!CAUTION] This is an advanced feature. Improper use can cause various issues including crashes

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-ultimaonlinedirectory / -uopath

Number of arguments: 1

Expected format:-ultimaonlinedirectory "/absolute/path/to/ultima_online"

Example: -uopath "/home/ultima/ultima"

Function:

Sets the path to the Ultima Online installation directory

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-profilespath

Number of arguments: 1

Expected format:-profilespath "/absolute/path/to/profiles"

Default when omitted: ./Data/Profiles

Example: -profilespath "/home/tazuo/profiles"

Function:

Sets the path to the directory holding user profiles

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-clientversion

Number of arguments: 1

Expected format:-clientversion "7.0.18.1"

Example: -clientversion "7.0.18.1"

Function:

Sets the client version.

Sent to the server upon entering the world.

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-lastcharactername / -lastcharname

Number of arguments: 1

Expected format:-lastcharactername "MyLastChar"

Example: -lastcharname "SirLancelot"

Function:

Sets the last used character name.

Depending on configuration, this option can be used to directly log in select a specific character.

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-lastservernum

Number of arguments: 1

Expected format:-lastservernum 1

Example: -lastservernum 2

Function:

Sets the index for the last used server.

This argument is used only as a fallback and only when a server cannot be matched by name.

For example, if your configuration specifies server X but server has been renamed to Y, name matching will fail and the client will fall back to the index set here.

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-last_server_name

Number of arguments: 1

Expected format:-last_server_name "ServerName"

Example: -last_server_name "NowhereInParticular"

Function:

Sets the last selected server name.

Depending on configuration, this option can be used to directly log into a specific server

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-fps

Number of arguments: 1

Expected format:-fps 60

Example: -fps 60

Function:

Sets the target framerate (Frames Per Second).

The value is parsed as an integer and clamped between 12 and 1000.

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-saveaccount

Number of arguments: 1

Expected format:-saveaccount true|false

Default when omitted: false

Example: -saveaccount true

Function:

Controls whether account details are saved into the settings file

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-autologin

Number of arguments: 1

Expected format:-autologin true|false

Example: -autologin true

Function:

Instructs the client to automatically continue with server and character selection after the login screen.

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-reconnect

Number of arguments: 1

Expected format:-reconnect true|false

Default when omitted: false

Example: -reconnect true

Function:

Controls automatic reconnection upon error

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-reconnect_time

Number of arguments: 1

Expected format:-reconnect_time 5000

Example: -reconnect_time 2000

Function:

Sets the reconnect attempt interval, in milliseconds.

Effective only when reconnect is enabled.

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-login_music / -music

Number of arguments: 1

Expected format:-login_music true|false

Example: -login_music true

Function:

Enables or disables login screen music

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-login_music_volume / -music_volume

Number of arguments: 1

Expected format:-login_music_volume 80

Example: -login_music_volume 80

Function:

Sets the login screen music volume, specified as a value from 0 to 250, where 250 represents full volume.

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-fixed_time_step

Number of arguments: 1

Expected format:-fixed_time_step true|false

Example: -fixed_time_step true

Function:

Controls whether the client’s game loop will attempt to use a fixed time step by way of a heuristic algorithm.

[!WARNING] This is feature is experimental and is currently disabled

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-plugins

Number of arguments: 1

Expected format:-plugins "plugin1,plugin2"

Example: -plugins "Razor/RazorEnhanced.exe",ClassicAssist/ClassicAssist.dll

Function:

Sets the list of plugins to load.

Plugins should be provided as a comma separated list of file names (including extension) and the files should be present inside the Data/Plugins folder

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-use_verdata

Number of arguments: 1

Expected format:-use_verdata true|false

Example: -use_verdata true

Function:

Instructs client to read the verdata.mul and use it to patch the currently loaded game.

This procedure may affect maps, tiles, gumps and so forth.

A valid verdata.mul file must be present in the Ultima Online installation directory.

[!CAUTION] This is an advanced feature. Improper use can cause various issues including crashes

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-maps_layouts

Number of arguments: 1

Expected format:-maps_layouts "MapHeight,MapWidth;MapHeight,MapWidth"

Example: -maps_layouts ""

Function:

Allows overriding default map sizes.

Overrides are provided as pairs of Width and Height, separated by a semicolon (;).

Note that order is important. The first entry is map 0, the next one is map 1 and so forth.

Standard maps are:

• 0 -> Fel
• 1 -> Tram
• 2 -> Ilshenar
• 3 -> Malas
• 4 -> Tokuno
• 5 -> TerMur

[!CAUTION] This is an advanced feature. Improper use can cause various issues including crashes

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-encryption

Number of arguments: 1

Expected format:-encryption 1

Example: -encryption 1

Function:

Instructs the client to use a specfic encryption.

Available options are:

• 0 -> NONE
• 1 -> OLD_BFISH
• 2 -> BLOWFISH__1_25_36
• 3 -> BLOWFISH
• 4 -> BLOWFISH__2_0_3
• 5 -> TWOFISH_MD5

[!WARNING] This is an advanced feature. Improper use can prevent client from communicating with the server

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-force_driver

Number of arguments: 1

Expected format:-force_driver 0|1|2

Example: -force_driver 1

Function:

Instructs the client to use a specific graphics driver.

• 1 -> OpenGL
• 2 -> Vulkan
• Any other value -> Default driver

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-language

Number of arguments: 1

Expected format:-language RUS|FRA|DEU|ESP|JPN|KOR|PTB|ITA|CHT|ENU

Example: -language ITA

Function:

Sets the UI language.

Accepted values (case-insensitive):

• ENU
• RUS
• FRA
• DEU
• ESP
• JPN
• KOR
• PTB
• ITA
• CHT
• Any other value will result in ENU being used

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Configuration

-highdpi

Number of arguments: 0

Expected format:-highdpi

Example: -highdpi

Function:

Instructs the client to treat the graphics output as a “High DPI” device. May improve window sizing and scaling for high resolution monitors.

This setting directly maps into the environment variable FNA_GRAPHICS_ENABLE_HIGHDPI.

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-skiploginscreen

Number of arguments: 0

Expected format:-skiploginscreen

Example: -skiploginscreen

Function:

Instructs the client to skip the login screen and connect using the provided credentials

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-no_server_ping

Number of arguments: 0

Expected format:-no_server_ping

Example: -no_server_ping

Function:

Instruct the client to not ping the server during server selection in the login screen

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-zlib

Number of arguments: 0

Expected format:-zlib

Example: -zlib

Function:

Forces usage of the managed Zlib implementation.

See this page for more information.

[!IMPORTANT] The managed implementation generally provides better compatability at the cost of lesser performance

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Debugging & Diagnostics

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-debug

Number of arguments: 0

Expected format:-debug

Example: -debug

Function:

Enables debug mode for the environment.

Can be used to unobtrusivley diagnose certain client issue.

[!WARNING] Debug mode increases the number of logs written and can impact performace

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-profiler

Number of arguments: 0 or 1 (optional)

Expected format:-profiler or -profiler true|false

Example: -profiler

Function:

Enables the profiler. Can be used to unobtrusivley diagnose certain client issue.

Passing no value or an empty ("") one will result in the profiler being enabled.

[!WARNING] The profiler increases the number of logs written and can impact performace

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-packetlog

Number of arguments: 0 or 1 (optional)

Expected format:-packetlog or -packetlog "0x1A,0x2B"

Example: -packetlog "0x1,0xA,0xFF"

Function:

Enables packet logging.

When a value is provided only the specified packet types will be traced.

Values should be provided as comma-separated hexadecimal numbers. Provided numbers are trimmed and accept an optional 0x prefix.

Example valid values: 0x1A, 1A, FF.

For more information, see Packet Logging in TazUO