Error: "Unable to open application.ica" or "Unable to Parse Command Line"

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In certain situations — usually immediately after an installation of Citrix — you may see an error message when launching a Virtual Office CS application, or a file may attempt to open in the incorrect application, such as Adobe Reader or Internet Explorer. In these situations, the .ica file type that Virtual Office uses may not be associated with the correct application. To resolve the issue, follow the instructions in Associating the ICA file type with Virtual Office CS or SaaS applications.

If you continue to see the "Unable to Parse Command Line" error after associating the .ica file, it may be a result of a bad registry key on your machine. While rare, you can resolve this issue using the following steps.

Because serious issues with the operating system may occur if registry changes are made improperly, we recommend that your qualified IT professional performs any registry changes and that a backup of the registry is made before proceeding with any changes.

  1. Press the WINDOWS key + R to open the Run dialog.
  2. Enter regedit and click OK.
  3. In the Registry Editor, browse to HKEY_CLASSES_ROOT\Applications\wfica32.exe\shell\open\command\. If you do not see these folders, then these steps do not apply to the issue you are currently having.
  4. Right-click the (Default) entry and click Modify.
  5. In the Value field, remove the quotation marks so that the field reads C:\Program Files (x86)\Citrix\ICA Client\wfica32.exe %1.
  6. Click OK and close the Registry Editor, then attempt to launch your Virtual Office CS application again.

Related topic

Citrix Client Overview for Virtual Office CS and SaaS

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