Yeah! I was inspired by your comments,finally I gave the %DB_%DEFAULT RW permissions.

It's very valuable，I'll read intensively

Sorry Jeff, I thought I had sent the email, but I just realized that I pressed the wrong button.

Thank you for offering in my two posts，I think I can do the rest by myself.

Best wishs,

Daoyuan

finally I solved the problem  by setting resource %DB_%DEFAULT RW permissions.

I can't even compile a class that doesn't extends any classes but only writes HelloWorld

Hi Jeff,

thank you for your reply,

the class can be compiled normally in Studio.

Thank you for answering me so quickly, but I'm still confused cause I'm a novice.

What is the '％Library.RoutineMgr_StudioOpenDialog ' for AND how should I grant execute on this thing  to ％Developer？

Hi Jeff, 

It's also not work in my localhost server. I'll try your suggestion and  I'll contact you if I still trapped in this problem.

thank you for your enthusiastic help.

Best wishes,

Daoyuan