I can't use PI Archive editor which grey out. Besides that the primary archive file is lost at anywhere. Perhaps should i do to configure it back to track. (I don't care about the previous archive even if i lose it)

From the screenshot, I can see you’re logged in as piadmin, so this is not a permissions issue. The problem is most likely due to an unregistered archive. You have two options:

1. Register the old archive (if you still had it) using: piartool -ar
2. Since you mentioned you don’t need the old archive, you can simply create a new one with: pidiag -ar

This will configure a new primary archive so that PI can start tracking data again.

From the screenshot, I can see you’re logged in as piadmin, so this is not a permissions issue. The problem is most likely due to an unregistered archive. You have two options:

1. Register the old archive (if you still had it) using: piartool -ar
2. Since you mentioned you don’t need the old archive, you can simply create a new one with: pidiag -ar

This will configure a new primary archive so that PI can start tracking data again.