# Trouble shooting

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In case of a CPA failure the following data are welcome:

•Failure description

•Print Screen of failure message

•Error text file (located under C:\Users\(Username)\AppData\Roaming\VAT\CPA; Necessary to enable hidden folder option)

Please provide this information to your local contact Contact - VAT Group.

# Known Issue

## Start Up Issue

Since the CPA v4.2.2

If the valve shows following failure message by starting the CPA:

This means that the C1.WPF.dll data is corrupt.

### Action

### Reload CPA firmware with a local CPA version (see Windows Executable Version) and Update Tool.