[TYPO3] T3D import error messages

[Robert Markula]

When I try to import a T3D file, I get a long list of errors in the 
messge tab. The errors are like:

"Possible error: tt_news:95 had no new id assigned to it. This indicates 
that the record was not added to database during import. Please check 
changelog!"

"Error: this records is NOT created it seems! (tt_news:95)"

"Error: D:/Ablage/wos_beta1/www/typo3/typo3temp/\imp19.tmp was NOT 
unlinked as it should have been!"

What is the cause for these errors and how can I prevent them? The 
source site works flawlessly.

Kind regards,
Ro