In CCS you have a limited license number installed, for example for 10 servers. You run the Asset Import job and in the scope you define the Default Site, which contains 1000 computers. The job fails and shows the error: "all available licenses are already assigned to other users".

The following errors may appear:

*** DPS.WorkerProcess.20111011102248.3200.00000.csv ***
(...)
24:13.0 24:13.0 CCSRPT Warning RMSMOSProvider Blade.WorkerProcess 3200 Dispatcher Submit Queue:9 9 ReadAndLogRmsMessage  0 0 "Information Server message for WNT.MACHINE (level = [2] : errorCode = [] : assetType = []): You are licensed to use the bv-Control for Windows software to report on 10 specific bv-Control for Windows Server Licenses. Because all available licenses are already assigned to other users, this query appears to exceed the boundary of your license agreement; therefore, 1000 bv-Control for Windows Server Licenses specific records that were within the scope of the query have not been reported. To request a license content file from Symantec, click the following link: http://www.symantecstore.com/renew/"
(...)

*** AppServer.Service.20110922090904.4660.00000.csv ***
(...)
10:31.6 10:31.6 CCSRPT Error Symantec.Core Appserver.Server 4660  43 Bind  0 0 "RetryHelper.Call(Search) - failed [The server is not operational.], context [Directory], stop retry flag [False], failed retry counter [3 of 10] : System.Runtime.InteropServices.COMException (0x8007203A): The server is not operational.

(...)

*** mmc_20111011_6928.log ***
(...)
11:35:37 | 6928 | 4400 | .\src\LicenseBase.cpp(2515) | 0: Error: [LICENSEMANAGER] Error readling license file! SLIC Status is - 0x0
12:00:55 | 6928 | 6464 | .\src\BVCommonResultsCallback.cpp(156) | 0: Exception: Could not find job from save set table
(...)

*** BVJobProcessor_20111011_5964.log ***
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12:02:56 | 5964 | 6176 | .\src\LicenseBase.cpp(2280) | 0: Error: [LICENSEMANAGER] Error creating license with feature name (BVC WIN workstation) and feature version (2.0).
12:02:56 | 5964 | 6176 | .\src\LicenseBase.cpp(2299) | 0: Error: [LICENSEMANAGER] Reason - The license has expired.
12:02:56 | 5964 | 6176 | .\src\LicenseBase.cpp(2280) | 0: Error: [LICENSEMANAGER] Error creating license with feature name (BVC WIN user) and feature version (2.0).
12:02:56 | 5964 | 6176 | .\src\LicenseBase.cpp(2299) | 0: Error: [LICENSEMANAGER] Reason - The license has expired.
(...)

Working as designed. If the target scope exceeds the number of licenses installed, then the Asset Import job fails. If you have only 10 licenses and you need to target only your specific 10 systems and ignore all other systems, then in the job scope please select the one time manual entry job and list there your 10 target systems.