OpenRA/OpenRA · error · LuaException

Attempted to call WDist.LessThanOrEqualTo(WDist, WDist) with

Error message

Attempted to call WDist.LessThanOrEqualTo(WDist, WDist) with invalid arguments.

What it means

Lua scripting error from the WDist binding's LessThanOrEqualTo operator (`<=`). Requires both operands to be WDist; throws if either fails conversion.

Source

Thrown at OpenRA.Game/WDist.cs:171

		{
			if (!left.TryGetClrValue(out WDist a) || !right.TryGetClrValue(out int b))
				throw new LuaException("Attempted to call WDist.Divide(WDist, integer) with invalid arguments.");

			return new LuaCustomClrObject(a / b);
		}

		public LuaValue LessThan(LuaRuntime runtime, LuaValue left, LuaValue right)
		{
			if (!left.TryGetClrValue(out WDist a) || !right.TryGetClrValue(out WDist b))
				throw new LuaException("Attempted to call WDist.LessThan(WDist, WDist) with invalid arguments.");

			return a < b;
		}

		public LuaValue LessThanOrEqualTo(LuaRuntime runtime, LuaValue left, LuaValue right)
		{
			if (!left.TryGetClrValue(out WDist a) || !right.TryGetClrValue(out WDist b))
				throw new LuaException("Attempted to call WDist.LessThanOrEqualTo(WDist, WDist) with invalid arguments.");

			return a <= b;
		}

		public LuaValue this[LuaRuntime runtime, LuaValue key]
		{
			get
			{
				switch (key.ToString())
				{
					case "Length": return Length;
					default: throw new LuaException($"WDist does not define a member '{key}'");
				}
			}

			set => throw new LuaException("WDist is read-only. Use WDist.New to create a new value");
		}

View on GitHub (pinned to a520984d91)

Solutions

1. Compare WDist to WDist: `wdist <= WDist.New(ceiling)`.
2. Or compare raw lengths: `wdist.Length <= 1024`.
3. Confirm both operands are WDist.

Example fix

-- before
if wdist <= 2048 then end
-- after
if wdist <= WDist.New(2048) then end

if a.Length <= b.Length then end

local function IsWDist(v)
    local ok, clr = pcall(function() return v.Length end)
    return ok and clr ~= nil
end

if IsWDist(left) and IsWDist(right) then
    le = left <= right
else
    le = left.Length <= right.Length
end

When it happens

Trigger: A Lua comparison like `wdist <= 1024`, `5 <= wdist`, or `wdist <= otherType` — comparison where left or right is not a WDist.

Common situations: Scripts using `<=` against a raw integer range/ceiling instead of a constructed WDist.

Related errors

• Attempted to call WDist.LessThan(WDist, WDist) with invalid
• Attempted to call WDist.Add(WDist, WDist) with invalid argum
• Attempted to call WDist.Subtract(WDist, WDist) with invalid
• Attempted to call WDist.Equals(WDist, WDist) with invalid ar
• Attempted to call WDist.Multiply(WDist, integer) with invali

AI-assisted analysis of OpenRA/OpenRA@a520984d91 (2026-08-13). Data as JSON: /api/errors/293fad19afe61c21. Report an issue: GitHub.