Page Layout+RadTabStrip

[Duygu]

I have this error

The Visible property cannot be set on Web Part 'g_XXX'. It can only be set on a standalone Web Part.

It gives error when add document to list webpart which is in radtabstrip's tab. Or when i want to edit page.
Everybody says not use "webpart.visible", use "webpart.hidden" but i did not do anything on code. Maybe radtabstrip doing this?
What is the problem and how can i fix this?
I have a pagelayout like this,

<asp:Content ContentPlaceholderID="PlaceHolderPageTitle" runat="server">
    <SharePointWebControls:FieldValue id="PageTitle" FieldName="Title" runat="server"/>
</asp:Content>
<asp:Content ContentPlaceholderID="PlaceHolderMain" runat="server">
    <WebPartPages:SPProxyWebPartManager runat="server" id="spproxywebpartmanager"></WebPartPages:SPProxyWebPartManager>
        <WebPartPages:WebPartZone id="g_ProjectWP" runat="server" title="Zone 1"><ZoneTemplate></ZoneTemplate></WebPartPages:WebPartZone>

        <telerik:RadTabStrip ID="RadTabStrip1" runat="server" SelectedIndex="0" ReorderTabsOnSelect="True"
                MultiPageID="RadMultiPage1" ShowBaseLine="true" CausesValidation="False">
                <Tabs>
                    <telerik:RadTab runat="server" Owner="RadTabStrip1" Selected="True" Text="Proje Sayfası">
                    </telerik:RadTab>
                    <telerik:RadTab runat="server" Owner="RadTabStrip1" Text="Title1">
                    </telerik:RadTab>
                    <telerik:RadTab runat="server" Owner="RadTabStrip1" Text="Title2">
                    </telerik:RadTab>
                    <telerik:RadTab runat="server" Owner="RadTabStrip1" Text="Title3">
                    </telerik:RadTab>
                    <telerik:RadTab runat="server" Owner="RadTabStrip1" Text="Title4">
                    </telerik:RadTab>
                </Tabs>
            </telerik:RadTabStrip>
            <telerik:RadMultiPage ID="RadMultiPage1" runat="server">
                <telerik:RadPageView ID="RadPageView1" runat="server" Selected="true">
                <div class="Left">
                    <WebPartPages:WebPartZone id="g_ProjeLeft" runat="server" title="Zone 2"><ZoneTemplate></ZoneTemplate></WebPartPages:WebPartZone>
                </div>
                <div class="Right">
                    <WebPartPages:WebPartZone id="g_ProjeRight" runat="server" title="Zone 3"><ZoneTemplate></ZoneTemplate></WebPartPages:WebPartZone>
                </div>
                </telerik:RadPageView>
                <telerik:RadPageView ID="RadPageView2" runat="server">
                <WebPartPages:WebPartZone id="g_Title1WP" runat="server" title="Zone 4"><ZoneTemplate></ZoneTemplate></WebPartPages:WebPartZone>
                </telerik:RadPageView>
                <telerik:RadPageView ID="RadPageView3" runat="server">
                <WebPartPages:WebPartZone id="g_Title2WP" runat="server" title="Zone 5"><ZoneTemplate></ZoneTemplate></WebPartPages:WebPartZone>
                </telerik:RadPageView>
                <telerik:RadPageView ID="RadPageView4" runat="server">
                <WebPartPages:WebPartZone id="g_Title3" runat="server" title="Zone 6"><ZoneTemplate></ZoneTemplate></WebPartPages:WebPartZone>
                </telerik:RadPageView>
                <telerik:RadPageView ID="RadPageView5" runat="server">

                <WebPartPages:WebPartZone id="g_Title4" runat="server" title="Zone 7"><ZoneTemplate></ZoneTemplate></WebPartPages:WebPartZone></telerik:RadPageView>
    </telerik:RadMultiPage>
    </asp:Content>

[Cat Cheshire]

Why do you want to show or hide these web parts?
Can you explain your case in more details?
Do you want to show or hide one web part upon some action performed in another web part?

[Duygu]

We must use a tabstrip for these webparts. Our customer wants this page  wiew. Each webpart in a tab. If made some action at one tab i will stay in same tab. That is why i  want this.

Important part is only  "list webparts"  gives that error. sharepoint or radtabstrip set visible to false, not my code.

[Helen]

Hello,

Did you try to set the RenderSelectedPageOnly property of RadMultiPage to true?

Kind regards,
Helen
the Telerik team

[Duygu]

Hi Helen,

I tried but did not work. 

[Helen]

Hi,

Did you try to set the PageViewID property of RadTab instead of the MultiPageID together with the RenderSelectedPageOnly of RadMultiPage?

Kind regards,
Helen
the Telerik team

[Duygu]

Hi Helen,

I tried   using PageViewID property  but it did not work.