DBArtisan连接sybase数据库报错

用Embarcadero DBArtisan连接sybase数据库报错：

Can not load Open Client,please verify that libsybct.dll/libct.dll and libsybcs.dll/libcs.dll are in your path. Please make sure your version of Open Client library is 11.1.1 or greater. If you are using an upgraded copy of Open Client 11.1.1,please install a full copy.

昨天还能用的，今天就报错了。