[InvalidCastException: Object cannot be cast from DBNull to other types.]
System.DBNull.System.IConvertible.ToBoolean(IFormatProvider provider) +57
ofertaacademica_interna.Page_Load(Object sender, EventArgs e) in c:\inetpub\www.udlap.mx\ofertaacademica\Default.aspx.cs:224
System.Web.UI.Control.OnLoad(EventArgs e) +86
System.Web.UI.Control.LoadRecursive() +129
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3712
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