What does the error message 'kImportPIFromFileCmdBoss' mean?

The error message "kImportPIFromFileCmdBoss" (whole message: com.censhare.client.javaclient.layout.PluginException: Error in communication with application Adobe InDesign: Fehler bei der Ausfuehrung des internen InDesign Befehls "kImportPIFromFileCmdBoss".) indicates that InDesign can't place a file.

Hint: A manual export (Menubar/File/Export.../ export as PDF ) directly in Adobe InDesign mostly shows the reason of the problem.