aiosp2() Error: failure in usdspn()

If you ever encountered error like this when running adpatch or adadmin:
aiosp2() Error: failure in usdspn()
Contents of error buffer are:
"usdsop cannot create a new process

Cause: usdsop encountered an error creating a new process. [Reason].

Action: Check that your system had enough resources to start a new process. Cont
act your system administrator to obtain more resou (RE"

You are using cygwin and you can't find any log about this error, then you should check your sh. Open command window, then type sh, press enter. If there is error, you should go to cygwin\bin directory and copy bash.exe to sh.exe. If there is no error, then you are facing another problem.