If you want to import a support packages without a valid “maintenance certificate” then you should see the following side effects of the operation…

Our SAP system’s “maintenance certificate” situation ;

There is no valid certificate installed.

Now let’s try to import a ST-A/PI support package to the system.

Goto SPAM press Display /define button and select the related component which you want to import support package’s.

As you can see there is a pop up like below ;

“No Valid Queue”

But if you go deeper and check the support package status , look’s like everthing is OK

Now install the new valid “maintenance certificate” and try again.

And finally you can “See & Import” the related support package to your system.