图层和表join时出现的问题？

<P>Public Function JoinTabletoLayer(ByVal pFeaLayer As IFeatureLayer)<BR>Dim pDispLTable As IDisplayTable<BR>Dim pFCLayer As IFeatureClass<BR>Dim pTLayer As ITable</P>
<P>Set pDispLTable = pFeaLayer<BR>Set pFCLayer = pDispLTable.DisplayTable<BR>Set pTLayer = pFCLayer</P>
<P><BR>Dim pTTable As ITable<BR>Dim pPropSet As IPropertySet<BR>Dim pFeatWorkspace As IFeatureWorkspace<BR>Dim pWorkspaceFact As IWorkspaceFactory</P>
<P>Set pPropSet = New PropertySet</P>
<P>With pPropSet '设置ArcSDE连接属性<BR>        .SetProperty "SERVER", serverName<BR>        .SetProperty "INSTANCE", "esri_sde"<BR>        .SetProperty "USER", CurrentUser.Name<BR>        .SetProperty "PASSWORD", CurrentUser.Password<BR>        .SetProperty "VERSION", "SDE.DEFAULT"  '可选，缺省为SDE.DEFAULT版本<BR>    End With<BR>Set pWorkspaceFact = New SdeWorkspaceFactory<BR>Set pFeatWorkspace = pWorkspaceFact.Open(pPropSet, 0)<BR>Set pTTable = pFeatWorkspace.OpenTable("BlockResult_SHY2")</P>
<P><BR>Dim pMemRelFact As IMemoryRelationshipClassFactory<BR>Dim pRelClass As IRelationshipClass</P>
<P><BR>Set pMemRelFact = New MemoryRelationshipClassFactory<BR>Set pRelClass = pMemRelFact.Open("tabletolayer", pTLayer, "OID", pTTable, "OID", "forward", "backward", esriRelCardinalityOneToMany)<BR>'Set pRelClass = pMemRelFact.Open("tabletolayer", pTTable, "OID", pTLayer, "OID", "forward", "backward", esriRelCardinalityOneToOne)</P>
<P><BR>Dim pDispRC As IDisplayRelationshipClass<BR>Set pDispRC = pFeaLayer<BR><FONT color=#f70909>pDispRC.DisplayRelationshipClass pRelClass, esriLeftOuterJoin</FONT></P>
<P><BR>Set pPropSet = Nothing<BR>Set pWorkspaceFact = Nothing<BR>Set pMemRelFact = Nothing</P>
<P>End Function</P>
<P>出现了以下的出错提示：run-time error '-2147467259(80004005)' ; </P>
<P>Automation error</P>
<P>unspecified error</P>
<P>debug后是红色的代码出错，请问是什么原因呀？</P>

up

<P>代码没错,是你的图层或对应的表有问题:</P>
<P><FONT color=#008000>'++ handle E_FAIL; likely cause is use of IMap::Layers when no layers match the IID</FONT><BR>        <CODE><FONT color=#0000ff>Case</FONT></CODE> <FONT style="BACKGROUND-COLOR: #0a246a" color=#ffffff>-2147467259</FONT>:<BR>           </P>

但是，即使不抱错，成功后，地图数据没有变化，这个原因在那？