In some cases, Windows is unable to open applications in the Virtual Office CS or SaaS environment because it doesn’t recognize the ICA file type or because the file has been damaged. The error message that contains this information is issued by the application that is currently associated with the ICA file. For example, you might receive an Adobe Reader error that states, "Adobe could not open application.ica because it is either not a supported file type or because the file has been damaged."

To fix this, you must change the default application associated with the .ICA file extension.

Windows 8.1

1. Open the Control Panel.
2. Choose Default Programs.
3. Choose Associate a file type or protocol with a program.
4. Find .ica in the list of file types.
5. Click the Change program button.
6. Choose Citrix Connection Manager from the Recommended or Other Programs section.
7. Click OK.

Windows 10

1. Open the Control Panel.
2. Choose Programs.
3. Choose Default Programs.
4. Choose Associate a file type or protocol with a program.
5. Click Choose default apps by file type.
6. Find .ica in the list of file types and then click the current assigned Default app.

   If .ica is not in the list of file types, you'll need to install Citrix.

7. Choose Citrix Connection Manager.

If Citrix Connection Manager is not available in the list to select, close the Control Panel window and complete to the following steps.

1. Browse to the location where you saved the application.ica file (the default is your Downloads folder).
2. Right-click on application.ica and choose Open with...
3. Click More apps
4. Mark the Always use this app to open .ica files checkbox and click More apps.
5. Scroll down and click the Look for another app on this PC link at the bottom of the dialog
6. Browse to the following location:  C:\Program Files (x86)\Citrix\ICA Client
7. Select wfcrun32.exe
8. Click Open.

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