Error: Class Crypto PP:: Invalid CypherText: Stream TransformationFilter: invalid PKCS#7block padding found

Class Crypto PP:: Invalid CypherText: Stream TransformationFilter: invalid PKCS#7block padding found
This error can happen when there's an issue with a system file for the application.

Solution

  1. If UltraTax CS is open, close the application.
  2. Go to
    X:\WinCSI\UTYYData
    where X is the drive UltraTax CS is installed to, and YY is the year of the application with the error.
  3. Rename the
    $SysData
    folder.
  4. Re-open UltraTax CS and check if the error comes back.
  5. If the error is gone, go back to X:\Wincsi\UTYYData and open the old renamed $SysData folder.
  6. Copy the
    ELFSTAT.DAT
    file.
  7. Paste it into the new $Sysdata folder.
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