[teradata] All virtual circuits are currently in use.
Now we use Tedradata Express 14.
We encountered the following errors and stoped this system.
08024 All virtual circuits are currently in use.

Please teach anyone how to resolve this issue?

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Too many sessions logged on, there's only a single PE on the Express version which supports up to 120 sessions.

Typical solution is to logoff some idle sessions and retry.

But when you already stoped Teradata (i.e. /etc/init.d/tpa stop) you can simply restart it (/etc/init.d/tpa start).

Same when you stoped Linux