EIdSocketError Undeclared Identifier

Using Indy10 and D7

With IdFtp am doing a try ... except block to catch EIdSocketError but
getting error Undeclared identifier EIdSocketError.

Am I missing something. Had no problem like this with Indy9.

My Uses clause contains:

IdBaseComponent, IdComponent, IdTCPConnection, IdTCPClient,
IdExplicitTLSClientServerBase, IdFTP, IdFTPList,IdAllFTPListParsers,
IdReplyRFC, IdFtpCommon, IdIntercept, IdLogBase, IdLogEvent,
IdIOHandler, IdIOHandlerSocket, IdIOHandlerStack, IdException