getting some error in keil while building

I think - in fact, I know - you are mistaken!

"while downloading the hex file to controller i should get error for dongle"

Maybe you are thinking of the wrong "dongle"?

The SECURITY KEY mentioned in the error message is the device that controls your use of the licensed Keil build tools & debugger - it is not referring to any download adaptor that you may be using...

BTW: do Keil still use hardware keys to control licensing? Or are you using an old version?

I think - in fact, I know - you are mistaken!

"while downloading the hex file to controller i should get error for dongle"

Maybe you are thinking of the wrong "dongle"?

The SECURITY KEY mentioned in the error message is the device that controls your use of the licensed Keil build tools & debugger - it is not referring to any download adaptor that you may be using...

BTW: do Keil still use hardware keys to control licensing? Or are you using an old version?

Thanks Andy ,
I got it what you saying. Your message is also a decent one . Thanks a lot.

Note that the Keil LPT-port Security Key ("dongle") does not necessarily play nicely with other devices also connected on the same port.

:-(

So, if you are using a download adaptor (or anything else) on the same parallel port as your Keil "dongle", that may cause issues...

thanks andy , i'll keep in mind . thanks once again.

have you worked with topview simulator?

No.

Ok , Thanks for your reply's.