What is this firmware version is it related to debugger or keil ide?

I have installed keil 4.73 in one system in that we are not able to detect some ulink pro d , and rest of ulink pro d (only firmware version 1.57) was working. and another system keil 5.36 there every debugger is working. Is there any way we can make it work for keil 4.73 since in website it was mentioned ulink pro d will work for keil4.73 and above version?

I have installed keil 4.73 in one system in that we are not able to detect some ulink pro d , and rest of ulink pro d (only firmware version 1.57) was working. and another system keil 5.36 there every debugger is working. Is there any way we can make it work for keil 4.73 since in website it was mentioned ulink pro d will work for keil4.73 and above version?

OK, I think this is a completely different issue. When you connect a ULINKpro D to MDK 4.73 which does not work, do you get the error message "Firmware download failed" as described on this page in step 5?

https://developer.arm.com/documentation/101416/0100/Troubleshooting/Troubleshooting-Guide/Hardware-Checklist

If yes, please follow the recommendations in this step 5 for older MDK versions. I hope this will solve your problem.