diff --git a/src/core/BaseDialog.ts b/src/core/BaseDialog.ts
index 5a1b167..e074bd9 100644
--- a/src/core/BaseDialog.ts
+++ b/src/core/BaseDialog.ts
@@ -35,7 +35,7 @@ namespace OS {
          */
         export abstract class SubWindow extends BaseModel {
             modal: false;
-            parent: BaseModel;
+            parent: BaseModel | typeof GUI;
 
             /**
              *Creates an instance of SubWindow.
@@ -91,8 +91,9 @@ namespace OS {
              * @memberof SubWindow
              */
             meta(): API.PackageMetaType {
-                if (this.parent && this.parent.meta) {
-                    return this.parent.meta();
+                const p = this.parent as BaseModel;
+                if (p && p.meta) {
+                    return p.meta();
                 }
             }
 
diff --git a/src/core/gui.ts b/src/core/gui.ts
index 892a87b..b1b30a4 100644
--- a/src/core/gui.ts
+++ b/src/core/gui.ts
@@ -165,7 +165,7 @@ namespace OS {
                     dialog = d as GUI.BaseDialog;
                 }
 
-                dialog.parent = undefined;
+                dialog.parent = GUI;
                 dialog.handle = resolve;
                 dialog.pid = -1;
                 dialog.data = data;
diff --git a/src/core/tags/ButtonTag.ts b/src/core/tags/ButtonTag.ts
index 4419b57..e72cdcc 100644
--- a/src/core/tags/ButtonTag.ts
+++ b/src/core/tags/ButtonTag.ts
@@ -60,7 +60,6 @@ namespace OS {
                 }
 
                 protected mount() {
-                    this._onbtclick = (e) => {};
                     $(this.refs.button).click((e) => {
                         const evt: TagEventType = {
                             id: this.aid,
@@ -76,6 +75,7 @@ namespace OS {
                 protected init(): void {
                     this.enable = true;
                     this.toggle = false;
+                    this._onbtclick = (e) => {};
                 }
                 protected calibrate(): void {}
                 reload(d?: any): void {}
diff --git a/src/core/tags/tag.ts b/src/core/tags/tag.ts
index b6c1963..a95573f 100644
--- a/src/core/tags/tag.ts
+++ b/src/core/tags/tag.ts
@@ -57,7 +57,10 @@ namespace OS {
             set(v: GenericObject<any>) {
                 for (let k in v) {
                     let descriptor = this.descriptor_of(k);
-                    if (descriptor && descriptor.set) this[k] = v[k];
+                    if (descriptor && descriptor.set) 
+                    {
+                        this[k] = v[k];
+                    }
                 }
             }
 
diff --git a/tests/testTag.ts b/tests/testTag.ts
index 2003ec2..d8ab74d 100644
--- a/tests/testTag.ts
+++ b/tests/testTag.ts
@@ -95,6 +95,13 @@ test("Test button tag behavior", () =>{
     bt.onbtclick = cb
     $("button",bt).trigger("click");
     expect(cb).toBeCalledTimes(1);
+    const data = {
+        text: "name",
+        onbtclick: jest.fn()
+    };
+    bt.set(data);
+    $("button",bt).trigger("click");
+    expect(data.onbtclick).toBeCalledTimes(1);
 });
  
  // Label test