New-PWDocumentVersion Error/Exception Handling

I am using New-PWDocumentVersion cmdlet as part of a script to synchronize DGN files on a server drive with the respective holdings on ProjectWise.

To deal with problems and exceptions in my script I have the following set:

$ErrorActionPreference = "Stop"
$WarningPreference = "Inquire"

The basic process involves creating a new version and uploading the PW document if the server file is more up-to-date than the PW file.  I create new versions like such and then update the file:

Get-PWDocumentsBySearch -FolderPath $pwfolder -FileName $theFile  | New-PWDocumentVersion -VersionString $verString | Out-Null

Get-PWDocumentsBySearch -FolderPath $pwfolder -FileName $theFile  | Update-PWDocumentFile -NewFilePathName $newfile | Out-Null 

For an unexplained reason the New-PWDocumentVersion cmdlet is failing, with the following text written to screen:

Error changing document '\path\xxx.dgn' to new version

The reason for the error is not clear and I am so far unable to recreate it consistently.  Most distressingly however, because the error is not raised as a normal Powershell exception, the script blithely continues and actually overwrites the document of the previous version.

Please can the cmdlet be updated to raise exceptions correctly?  Actually I've also noted this on other cmdlets too, including Update-PWDocumentAttributes, therefore this request can be opened up to all cmdlets.