Hello Peter,
90 seconds is the default AsyncPostBackTimeOut property value of
ScriptManager. To solve the problem, we can increase the timeout by adding
the property AsyncPostBackTimeOut to the script manager:
<asp:ScriptManager ID="ScriptManager1" runat="server"
AsyncPostBackTimeOut="600" >
</asp:ScriptManager>
Please have a try and let me know if it works for you.
Regards,
Jialiang Ge (
[email protected], remove 'online.')
Microsoft Online Community Support
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