could not create an AsyncConnection

[jwu12]

Hi,

I used the statement like:
AsyncConnection asyncConnection = pfcAsyncConnection.AsyncConnection_Start(cmdArgs, null);

java compiling no error, But run this program, there is an error in this line, error message is:
com.ptc.pfc.Implementation.pfcExceptions$XToolkitGeneralErro r
at com.ptc.pfc.pfcAsyncConnection.pfcAsyncConnection.AsyncConne ction_Start(Native Method)

I don't know why, what means XToolkitGeneral Error. Please somebody give help.

Thanks.

Jeff