egametang/ET · error · Exception

condition node owner key field not found: {node.GetType().Fu

Error message

condition node owner key field not found: {node.GetType().FullName}.{nameof(BTNumericCompare.OwnerKey)}

What it means

Thrown by SetOwnerKeyField when the parser encountered the `OwnerKey.Variable` dotted syntax (e.g. `Unit1.HP > 0`) and the selected condition node has no public instance field named `OwnerKey`. The OwnerKey mechanism is what tells the runtime which entity the variable reads from, so its absence is fatal.

Source

Thrown at Packages/cn.etetet.conditionexpr/Scripts/Model/Share/ConditionExprParser.cs:286

        }

        private void SetCompareField(BTCondition node, string fieldName, object value)
        {
            FieldInfo fieldInfo = node.GetType().GetField(fieldName, BindingFlags.Instance | BindingFlags.Public);
            if (fieldInfo == null)
            {
                throw new Exception($"condition node field not found: {node.GetType().FullName}.{fieldName}");
            }

            fieldInfo.SetValue(node, value);
        }

        private void SetOwnerKeyField(BTCondition node, string ownerKey)
        {
            FieldInfo fieldInfo = node.GetType().GetField(nameof(BTNumericCompare.OwnerKey), BindingFlags.Instance | BindingFlags.Public);
            if (fieldInfo == null)
            {
                throw new Exception($"condition node owner key field not found: {node.GetType().FullName}.{nameof(BTNumericCompare.OwnerKey)}");
            }

            if (fieldInfo.FieldType != typeof(string))
            {
                throw new Exception($"condition node owner key field must be string: {node.GetType().FullName}.{nameof(BTNumericCompare.OwnerKey)}");
            }

            fieldInfo.SetValue(node, ownerKey);
        }

        private void SetParamsField(BTCondition node, string[] paramValues)
        {
            FieldInfo fieldInfo = node.GetType().GetField("Params", BindingFlags.Instance | BindingFlags.Public);
            if (fieldInfo == null)
            {
                throw new Exception($"condition node params field not found: {node.GetType().FullName}.Params");
            }

View on GitHub (pinned to 5cab01f7a8)

Solutions

1. Add `public string OwnerKey;` to the custom node class.
2. Ensure the entity whose key you write (e.g. `Unit1`) was registered via BTEnv.AddEntity(key, owner) at the call site.
3. If the node never needs an owner, only ever reference it in the bare-variable form (no dot) so the parser does not call SetOwnerKeyField.

Example fix

// before
[ConditionVariable("HasBuff")]
public class HasBuffNode : BTCondition { /* no OwnerKey */ }
// used as:  Tank.HasBuff > 0
// after
[ConditionVariable("HasBuff")]
public class HasBuffNode : BTCondition
{
    public string OwnerKey;
}

static bool HasOwnerKeyField(Type t) =>
    t.GetField("OwnerKey", BindingFlags.Instance | BindingFlags.Public) != null;

When it happens

Trigger: Using a `OwnerKey.Variable` reference against a custom [ConditionVariable] node that does not declare `public string OwnerKey`. Per AGENTS.md, OwnerKey must be a public string field on the node; using the dotted form with a node that lacks it triggers this.

Common situations: Reusing a numeric compare style for a non-numeric custom node and forgetting the OwnerKey field; renaming the field to `Owner`/`Target`; adding a new variable node but only testing the bare-variable form (`HP > 0`) which skips SetOwnerKeyField.

Related errors

• condition node field not found: {node.GetType().FullName}.{f
• condition node owner key field must be string: {node.GetType
• condition node params field not found: {node.GetType().FullN
• condition node params field must be string[]: {node.GetType(
• condition variable node create error: {nodeType.FullName}

AI-assisted analysis of egametang/ET@5cab01f7a8 (2026-08-13). Data as JSON: /api/errors/1433ae4bc2e1f3ad. Report an issue: GitHub.