Troubleshooting Problems Opening APPLICATIO Files
Common Problems Opening APPLICATIO Files
ClickOnce Deployment Manifest is Not Installed
When you double-click your APPLICATIO file, you may see a dialog box from your operating system stating that it "Cannot Open This File Type". If this is the case, it's usually due to the fact that you do not have ClickOnce Deployment Manifest for %%os%% installed on your computer. Because your operating system doesn't know what to do with this file, you won't be able to open it by double-clicking.
Tip: If you know of another program that can open your APPLICATIO file, you can try opening it by selecting the application from the programs listed.
Wrong Version of ClickOnce Deployment Manifest is Installed
In some cases, you might have a newer (or older) version of a ClickOnce Deployment Manifest file that is unsupported by your installed application version. If you do not have the proper version ClickOnce Deployment Manifest (or any of the other programs listed above), you may need to try downloading a different version of it, or one of the other software applications listed above. This problem is most common when you have an older version of the software application, and your file was created by a newer version that it cannot recognize.
Tip: Sometimes you can get a clue about the version of APPLICATIO file you have by right clicking on the file, then clicking on "Properties" (Windows) or "Get Info" (Mac OSX).
Summary: In either case, the majority of problems opening APPLICATIO files are related to not having the correct software application installed on your computer.
Other Causes of APPLICATIO File Opening Problems
Although you might already have ClickOnce Deployment Manifest or another APPLICATIO-associated software installed on your computer, you can still encounter problems opening ClickOnce Deployment Manifest files. If you are still having problems opening APPLICATIO files, there may be other issues that are preventing you from opening these files. These other problems include (listed in order from most to least common):
- Invalid APPLICATIO file references in the Windows Registry (the "phonebook" of the Windows Operating System)
- Accidental deletion of the description of the APPLICATIO file in the Windows registry
- Incomplete or bad installation of a software application associated with the APPLICATIO format
- Your APPLICATIO file is corrupted (issues with your ClickOnce Deployment Manifest file itself)
- Your APPLICATIO is infected with malware
- Device drivers of the hardware associated with your APPLICATIO file are corrupt or out-of-date
- Your computer does not have the adequate system resources to open the ClickOnce Deployment Manifest format
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