Hi Yocto,
Thanks for the reply.
The thing is the operating system I'm using is FreeRTOS. The bsp type is "freertos".
Another issue I found is that when I tried to right-click the project, then go to "NIOS II" -> "BSP Editor". The following error message is displayed in the Problems tab of BSP Editor.
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SEVERE: Available BSP type values for the --type argument are: [hal, ucosii]
SEVERE: BSP type "freertos" unknown.
SEVERE: NullPointerException
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I think I encountered this problem when I replaced my software libraries ("Copy and Replace" the project folder) with the latest one.
I already cleaned all the projects and rebuild, but I still encountered the problems indicated above. Note that no problems have been encountered whenever I build the project. It's just that I can't re-generate the BSP after compiling to a new system.