在帮助中有这么一段描述： To change VisiconX to use synchronous execution: 1 Access the fixuserpreferences.ini file. 2 Change the setting for RunAsynch to FALSE: [VisiconX] RunAsynch=FALSE NOTE: By default, VisiconX uses asynchronous execution logic to SELECT data from an OLE DB provider. You need to change this setting if your OLE DB provider does not support asynchronous execution. When you change this setting, it is applied globally in the WorkSpace (for all VisiconX data controls and all OLE DB providers in all pictures). You do not need to re- build or re-save pictures. The data control uses synchronous execution the next time you open a picture. 我在项目中用到了VISICONX，但偶尔碰到连接不上并画面无法关闭、画面使用功能失效的情况，这种情况很少但很致命，请问是否和这个设置有关。另asynchronous execution是什么意思，如何判断OLEDB是否支持它。请大家帮忙看看。谢谢