Running or Opening a Model or Application and Its Documentation
Running an Application
You can run an application built with the Application Builder by clicking  Run application. This button is not activated for models.
Opening a Model or Application
Once you have located the file you want to open — for example, you used a search and it is successful (see Searching the Application Libraries), or you browsed the Application Libraries tree — then to open the file:
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Double-click the name in the tree.
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Select the name, then click Open.
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Right-click the name, then from the context menu select Open.
It is possible to open and postprocess models that include functionality that you have blocked or that your license does not include. Nodes with functionality that requires a license for a product that is blocked or not available get a License Error subnode (), where you find information about the missing but required product license. Unless you disable or remove such nodes, it is not possible to re-solve such models.
If the node represents a solved model () or a compact () or solved application, the file will open directly. If, instead, the file is a compact model MPH-file or a preview file () and you are connected to the internet, you will be presented with the applicable download options:
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For a compact file, choose between opening the local model MPH-file and downloading the solved version before opening.
If you select Do not show this dialog again (preference setting), the local file will open directly the next time you open a compact model. If you change your mind later, you can control the behavior using the Ask about download before opening compact application file check box on the Application Libraries page of the Preferences dialog
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For a preview file, choose between downloading the file with or without solutions, that is between the solved and the compact MPH-file.
The approximate download sizes are displayed next to the options. For models, the numbers shown do not include the documentation, which is downloaded together with the MPH-file if you have chosen to install documentation.
If you have no internet connection or if the Application Library Update server is unavailable for some other reason, these dialogs will not appear and the associated context-menu options will not be shown. You can entirely disable availability checks on the Preferences dialog’s Application Libraries page by clearing Check Application Library Update availability on first access. (If you already opened the Application Libraries window, this setting will take effect in the next session.)
Opening a PDF Document
To read the documentation in PDF format, including step-by-step instructions:
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Click to highlight the name in the tree, then click Open PDF Document.
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Right-click the name, then from the context menu select Open PDF Document.
You can enable the Open PDF Document button for a user-library model or application by placing a PDF-file with the same name as the MPH-file in the same folder.
PDF and HTML documentation is available also for preview nodes if online help is activated; see The Help Window and Topic-Based Help.
Opening the Application Gallery
The Application Gallery, which is a part of the COMSOL website, provide access to a large number of models and applications, and you can download the MPH-files, PDF documentation, and other related files to extend the application libraries. Click the Application Gallery button () above the application libraries tree to open the Application Gallery in a web browser.