Maybe that is the problem.

1)
Please create a simple folder name for the temporary build system. This is where the cache is stored.

Example: c:\myVisualMicro\Builds

2)
Copy the name of the folder you have created into "Tools>Options>Visual Micro>Compiler>Temporary Build Folder"

Then try two builds.

Thanks

Yeah, I have tried the solution you provided yesterday and the problem is solved now!!!!

It's really because of the compex path, which has Chinese name!!!!

However, sorry to tell you that, modifying the "arduino.ar" to "core.a" works faster than the solution you provided to me, though it's not perfect, but I will use my solution at the same time.
The reason why modifying "arduino.ar" to "core.a" works faster is, the compiler skip the comipling process of the core files instead of checking and archieveing it, which cost serveral seconds.

I am sorry I care about these seconds, becasue waiting is a little boring which will influence my programming effiency.

Programmers produce more than 500 lines code perday almost care these seconds as me.

Anyway, thanks for your attention and hope you can fix the problem of complex path detection in the next version as soon as possible.

Yes, I do........