Issue
When you try to digitally sign a PDF in Adobe Acrobat 8 or 9 on Windows, the application returns the error message "Creation of this signature could not be completed. Platform Exception." The error message is followed by one of these expressions:
- "Object already exists. Error Code: 2148073487"
- "Keyset does not exist. Error Code: 2148073494"
- "Key not valid for use in specified state. Error code: 2148073483"
Solution: Re-create the digital ID and/or Crypto folder
Do one or both of the following solutions:
Re-create the digital ID
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Open Acrobat.
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Choose Advanced > Security Settings.
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In the list of categories on the left side of the Security Settings window, choose Digital IDs.
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Select the digital ID with which you were trying to sign the PDF.
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Click Remove ID.
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In the confirmation dialog box, click OK.
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Click Add ID.
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Follow the onscreen instructions to re-create the digital ID.
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Click OK.
Re-create the Crypto folder
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Close Acrobat.
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In Windows Explorer, do one of the following:
- On Windows XP, navigate to C:\Documents and Settings\[your user name]\Application Data\Microsoft.
- On Windows Vista, navigate to C:\Users\[your user name]\AppData\Roaming\Microsoft.
Note: These paths include hidden folders. To make hidden folders visible, see Show hidden files and folders in Windows 10 and earlier.
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Rename the Crypto folder Crypto Old.
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Open Acrobat. The Crypto folder is re-created automatically.