Execute Verification Checks 
To improve the quality of product system information and to enable system upgrades and updates, you can run verification checks for product systems. The verification is especially necessary since most product system information is created manually, which can be a cause of errors.
The verification analyzes your system landscape description in the Landscape Management Database (LMDB), and compares it to the information from the SAP Support System. You can resolve most of the problems directly in the product system editor.
Problems like the following can be detected:
Infrastructure (technical requirements): For example, problems when connecting to the SAP support system or when connecting your SAP Solution Manager to the System Landscape Directory (SLD)
Technical systems: For example, incorrect assignment of landscape patterns (hub or sidecar) or of incorrect product instances based on the installed software components
Product systems: For example, incorrect or missing assignment to a product version or product instance, such as missing instances that are a prerequisite for an assigned instance, or insufficiently configured data suppliers that report system data to the SLD.
Prerequisites
Your managed systems are registered and up-to-date in your System Landscape Directory (SLD). For information about registering the managed systems, see the documentation for the System Landscape Directory under Configuring Systems to Connect to SLD at www.help.sap.com.
You have created the product systems in the product system editor of the LMDB, as described under Create Product System Information.
Activities
You can run verification checks in two different places in the SAP Solution Manager:
Verification in the Product System Editor of LMDB
Here, you can verify a selected product system directly in the product system editor. This is very helpful if you want to verify settings that you have just made for a system:
Start SAP Solution Manager: Work Centers (transaction solman_workcenter) and choose
Solution Manager Administration 
Landscape Product Systems 
.Select the product system and choose Edit.
Select the Verification step at the end of the navigation tree and choose Execute Verification Check. The check is done synchronously when you are in edit mode. In display mode, a batch job is started and you can check for the check result asynchronously.
Error Correction:
Errors (red icon) require correction to enable system upgrade with the Maintenance Optimizer.
You should resolve warnings (yellow icon), but if you do not, Maintenance Optimizer will work. Example: No software component has yet been assigned.
Read the messages and information texts for each error.
To navigate to the area where action is required, choose the link in the Action column.
Repeat steps 3 and 4 for all errors.
Verification in SAP Solution Manager Work Center
Here, you can check several product systems at the same time:
Start SAP Solution Manager: Work Centers (transaction solman_workcenter) and choose
Solution Manager Administration Landscape Product Systems .In the Result column, you can see the current verification status of the latest check for each product system.
To update the verification, choose one or several systems and choose Execute Verification Checks. The verification runs asynchronously, therefore refresh the list from time to time.
To resolve errors, select a line and choose Edit. Check the verification results of the selected product system.